You said you're 100% gay. You like guys; in particular gay guys. I'm presuming who you refer to as "he" is really a "she", and she likes girls. If she transitions to female (regardless of genitals), she'll be a lesbian. If you're in a relationship, you'll both be considered to be in a straight relationship. Are you certain that's something you both can handle, since you asserted your homosexuality? You said it's all superficial, but can you really be with a woman?
I know you're hurt, and hurting, and very emotional now. Please take it easy and don't set yourself up to be hurt again. Women tend to get scared off by clingy, desperate guys.