Back off a bit, regroup and reassess your entire situation. Sit down and do some introspection and really try to determine what it is you want and deserve. I'm sorry to be blunt about this but it is clear to me that as far as Mr. A is concerned you are merely a placeholder to him until he finds someone else. I know that you love him dearly but the respect and admiration is not mutual on his part and he is just setting you up for more heartache right now.
I think right now you just need some YOU time. Forget about Mr. A and any possible reconcilliation you think there may be with him. Concentrate and focus on making your life more fulfilling without him or anyone else for that matter. In the end it will give you a renewed sense of self-confidence and will make you more attractive to even Mr. A and then at that point you will be on much more solid ground about making a decision on whether you want to invest anymore time and emotion with him.
