Elgalad
Bully!
Going to lay down a little background, but since it might be a little long, it'll be inside a spoiler, please bear with me. 
So my question is this: how can I restore friendly relations with the AI leaders once they think I've been both a 'warmonger' and a 'betrayer'? Is it even possible?
I have plenty of resources to give away but no one wants them. I offer open borders and everyone will take them from me but won't give anything back in return. I'm staying inside my own lands, not being aggressive anymore (for now).
However unfair I think my reputation was sullied, I just want to know if there's any way to get it back. I'd really like to trade for luxuries I don't have and start some research agreements.
Does anyone have any ideas?
Edit: forgot to mention; My score is on top of the 'known' civs, but not that far ahead of everyone else. At least two of my neighbors are more technologically advanced than me. I have the most powerful military on the continent. And my happiness is well in the positive. Not sure if any of that helps or not.
-Elgalad

Spoiler :
I'm currently playing a game as Bismarck on the Prince level.
So I'm sharing a continent with Monty, Elizabeth, Gandhi, Washington, Darius, and Harun al-Rashid (?).
Up until about 1AD, I've been great friends with Washington and Gandhi, and they love each other as well. All the others are 'Neutral' save Elizabeth who just seems to dislike me for unknown reasons.
I've been an 'honorable' neighbor, only going after barbarians and not denouncing anyone, giving my friends resources when they ask, etc, and open borders as well (though only Gandhi and Washington asked). Basically, a good guy.
So I reach a point where I'm ready to start being 'assertive'.
It starts like this:
City-State Venice asks me to take out Singapore, which is right on my border and a good plum to take as I expand. I declare war and wipe out Singapore in about 10 turns with Landsknechts and swordsmen. As a result, Venice becomes my 4th city state 'ally'. Great!
I figure that since my troops are right there ready to go, and Monty's been Really frisky, expanding in a beeline right towards my empire, maybe I'll teach him a lesson and snap up a few of his close cities too, shove him back, knock him down a few pegs (his score was near the top of the list at the moment). Besides, no one really likes him, he has no 'friends' that I can see after checking the new diplomacy list.
But before I do, I go to my buddies George and Mohandes. George happily agrees to go to war for only 45 turns of gems and some gold, which I trade to him. Gandhi says no thanks, he has butterflies to pet or something.
Okay, so Washington declares war and I wait a turn so that Monty starts moving all his troops towards him and away from My border. (I'm not That nice of a guy, I figure my ally can tank for me while I play the rogue, heh)
Next turn I declare war on the Aztecs. All four of my city state allies do too, cool.
Okay, now the feces starts impacting the rotating ventilation device..
Darius, Harun, and Liz all denounce me. I figure fine, they weren't that close in the first place..
Then Gandhi Also denounces me. Now I"m a little perturbed.. I gave him the chance to play too and he didn't want to. Ah well, he's a tree hugging pacifist, whatever.
Okay, but then on the third turn After I declare war on the Aztecs, George Washington comes out with a scathing verbal attack on my character.
WTH!?
Hey, I PAID him to go to war with Montezuma. And though I didn't declare myself immediately, I didn't wait that long to do so. And we're both at war with the same guy, shouldn't that make him LOVE me even more now? What gives?
So anyway, I was only at war for 400 years or so (playing on epic level, not sure how many turns). Long enough to snap up 2 cities.
I offer peace, Monty jumps at it, pays me a third city, resources, lots of goodies (heck, he's almost totally surrounded by Washington, me, and 4 city states, he's desperate). I raze the city because it was junk and I wanted a little breathing room between him and me to expand into.
When -my- war ends with him, so do my city state allies, but Washington stays at war for another couple hundred years before he works things out with Monty too.
Okay, back to the purpose of the post..
So I'm sharing a continent with Monty, Elizabeth, Gandhi, Washington, Darius, and Harun al-Rashid (?).
Up until about 1AD, I've been great friends with Washington and Gandhi, and they love each other as well. All the others are 'Neutral' save Elizabeth who just seems to dislike me for unknown reasons.
I've been an 'honorable' neighbor, only going after barbarians and not denouncing anyone, giving my friends resources when they ask, etc, and open borders as well (though only Gandhi and Washington asked). Basically, a good guy.
So I reach a point where I'm ready to start being 'assertive'.
It starts like this:
City-State Venice asks me to take out Singapore, which is right on my border and a good plum to take as I expand. I declare war and wipe out Singapore in about 10 turns with Landsknechts and swordsmen. As a result, Venice becomes my 4th city state 'ally'. Great!

I figure that since my troops are right there ready to go, and Monty's been Really frisky, expanding in a beeline right towards my empire, maybe I'll teach him a lesson and snap up a few of his close cities too, shove him back, knock him down a few pegs (his score was near the top of the list at the moment). Besides, no one really likes him, he has no 'friends' that I can see after checking the new diplomacy list.
But before I do, I go to my buddies George and Mohandes. George happily agrees to go to war for only 45 turns of gems and some gold, which I trade to him. Gandhi says no thanks, he has butterflies to pet or something.
Okay, so Washington declares war and I wait a turn so that Monty starts moving all his troops towards him and away from My border. (I'm not That nice of a guy, I figure my ally can tank for me while I play the rogue, heh)
Next turn I declare war on the Aztecs. All four of my city state allies do too, cool.
Okay, now the feces starts impacting the rotating ventilation device..
Darius, Harun, and Liz all denounce me. I figure fine, they weren't that close in the first place..
Then Gandhi Also denounces me. Now I"m a little perturbed.. I gave him the chance to play too and he didn't want to. Ah well, he's a tree hugging pacifist, whatever.
Okay, but then on the third turn After I declare war on the Aztecs, George Washington comes out with a scathing verbal attack on my character.
WTH!?

Hey, I PAID him to go to war with Montezuma. And though I didn't declare myself immediately, I didn't wait that long to do so. And we're both at war with the same guy, shouldn't that make him LOVE me even more now? What gives?
So anyway, I was only at war for 400 years or so (playing on epic level, not sure how many turns). Long enough to snap up 2 cities.
I offer peace, Monty jumps at it, pays me a third city, resources, lots of goodies (heck, he's almost totally surrounded by Washington, me, and 4 city states, he's desperate). I raze the city because it was junk and I wanted a little breathing room between him and me to expand into.
When -my- war ends with him, so do my city state allies, but Washington stays at war for another couple hundred years before he works things out with Monty too.
Okay, back to the purpose of the post..
So my question is this: how can I restore friendly relations with the AI leaders once they think I've been both a 'warmonger' and a 'betrayer'? Is it even possible?
I have plenty of resources to give away but no one wants them. I offer open borders and everyone will take them from me but won't give anything back in return. I'm staying inside my own lands, not being aggressive anymore (for now).
However unfair I think my reputation was sullied, I just want to know if there's any way to get it back. I'd really like to trade for luxuries I don't have and start some research agreements.
Does anyone have any ideas?
Edit: forgot to mention; My score is on top of the 'known' civs, but not that far ahead of everyone else. At least two of my neighbors are more technologically advanced than me. I have the most powerful military on the continent. And my happiness is well in the positive. Not sure if any of that helps or not.
-Elgalad