I find myself posting in the opposite situations on many occasions, when a MtF finds that their female partner is initially supportive and then seem to back down. My sort of standard comment is to think about what the other person wants from a relationship. If a female falls in love with a person who she thinks is a guy, then she is probably looking forward to the classic female family relationship, fall in love, wedding, house, kids, family life. Or variations upon that. When the 'guy' reveals he is really a she and can't cope with 'acting' like a guy anymore then it falls down. The girlfriend will hang around expressing love with, I personally think, is the hope that her partner will change their opinion. After all she has put a lot of time into the relationship to achieve her biological full-fill meant. Even if it is a subconscious wish.
Your boyfriend may be doing the same. He fell in love with a person who he thought was a woman. he again may have the male wish/dream biological need whatever, of marrying a woman, having children, being a father and a husband. Or whatever it is guys want. He may have now revealed his true thoughts and his problems with the relationship. If he isn't gay how will he interact with you as a guy? I had exactly the same experience with a female friend, who was most upset when I told her I was a female and going to live as me. She loved the 'male' me and had hoped at some future time to have a relationship with the male me. She was devastated when she met Cindy as she was not a lesbian, and neither am I. We are now close girl friends and enjoy each other as girl friends.
Sadly I would prepare to think about the future of your relationship as, hopefully, friends; but be very aware that it may end very quickly.
I'm extremely sorry to put this opinion forward, but I also think that we need to be realistic about stuff
With Sorrow
Cindy
as a guy, then it flls down.