Am I still a lesbian, if I date transsexuals?

Dear Women2Women: I really need your help. I'm an AG who has been dating transsexual men for the past 2 years. My friends says I'm straight, but I have no attraction to men, and the only type of transvestites I'm attracted to are the ones who can pass without a doubt. For years I dated women, but there was always something missing, women always needed more than I could give. On the inside I still feel like a lesbian, but I no longer participate in any of the activities in the LGBT community, out of fear my girlfriend and I will not be welcomed. So, am I still a lesbian?