Sorry to hear the line has been drawn in the sand. It really hurts when that realization happens. I never really thought my dad would shun me. I was SOOOO WRONG!! I will keep you in my thoughts. Your therapist is right. You have to live the way YOU want to live. If you live for anyone you cheat yourself and end up unhappy. The saddness will dissipate in to a happy new life.
http://www.gayxjw.org/ Check it out if you haven't already.