If the AI refuses your deal it is not a broken deal, because there never was a deal to brake. A refusal is just a refusal, and a broken deal is something that occurs if you break a deal that has already been made. Breaking a deal requires that you have a deal, and then do one of many things before the end of the 20 turn time limit, for most deals (peace is until war, etc.), to make that deal obsolete. Breaking a deal in the advisor scree, however, does not tarnish your rep.... I believe
Sorry to be so redundant, but the above posters I thought had responded well, and your above thread initiation asking for a pro to respond was, well, a little vague.
Disclaimer: I am not a pro.