My family doesn't accept me either. It's not that they don't believe I have bipolar disorder - it's just that they don't think that's an excuse for erratic or destructive behavior even when I'm suicidal. I've just learned that there are some people you can talk to about this and others you can't and you have to accept that. You can't change them anymore than they can change you. I'm sorry you aren't getting the support that you need from them so find a group of people who can accept you for who you are and confide only in them.