I'm sorry hon, discounting you because of bipoar means that he doesn't care of what you think anyways...it's just a convenient excuse to be a jerk. He's immature and self-centered...reminds me of an overgrown baby with a wet diaper on.
You are absolutely right in your logic and thinking, and all you have is a ball and chain attached to your leg...not much love there I can see.
Talk to your parents and forget about the bipolar aspect...it's nothing to be grudgy about. I'm sure that they want the best for you and your children, they are their grandchildren. I'm sure they can see what's really going on.
I don't know hon, life's hard enough even without dealing with a ball and chain. Who needs it? He needs to grow up or move on.