Here is a thought to ponder ... we are made up of particles that are as old as the universe ... so our particles will continue forever.
But we arent realy this particles, are we?
Try to see life this way then.
1) You pass on your genes to your children for them to continue
2) You pass on your knowledge and experience unto others
Either way elements of your consciousness continues. If you reach the end of your life and you have done either of the two you can be content.
I myself have done the later, even on this forum and others as well as helped people develop in their career and am now helping people volunteering. Try to think of it as the "pay it forward" philosophy.
Trying to do the the former can be pretty fun too...

Considering that I was extremely pissed off and crying when I had to leave nothingness and enter this world, I'm looking forward to seeing what that blissful nothingness that I didn't want to leave is like.
ohh...very romantic, see you in hell...

question: is it possible that if you had to leave that nothingness you werent that nothingness so you have to come here to become more like that nothingness?
Attachment is the source of love and happiness too. Usually it's worth it.
It is true according to the point of wiew but, I guess, unless you give a chance to a real detachment you will never know...
Yes, eternity, even if it is pleasurable, sounds scary.
If it was pleasurable it would have scared me but if it is immortal and blissfull I am down with it.