A lot of bad background and experience can be helped with a different background and experiences. It's important to remember bad experiences but to realize they are only experiences and not "you" and that there are other types of experiences out there.

As Lynn suggests, I would try to get all the education you want and get yourself in a position to be more on your own so you can get away from the difficult family life. If this relationship you have been in for a year and a half has not been a bad one, see if you can trust it and the other person enough to help you get away from your unhealthy family life and more on your own.