Thats very hard to deal with. I am thinking maybe Ts illness is making her seem distant and snappy, maybe she is feeling crap- its not an excuse for her behaviour though. I think you need to bring all of this up again in your next session or else it will fester.
YOur sexuality is quite a significant thing and if t wasn't interested that would concern me. I am going through a similar situation myself and it can be confusing and scary to be questioning your sexuality and everything you have been for the last 15 years. I would totally call t out on that next time and tell her it is a big deal for you and you need her here in the present and need her help and support right now.