here is my take on the situation. you met online and found out you were a crossdresser. she probably thought it would be fun to dress a guy up like a girl. I know so many girls that love to do that. so your friends you hang out. shes a straight girl(i'm being very hetero normative here but this is all speculation), who has found one of the few guys that are caring, emotional and not an asshole(i'm guessing at least). She was thinking that you would just be friends but now maybe she is interested in more, but feels uncomfortable dating a crossdresser. Just a thought.
~ April