Can anyone relate to this or give me some advice?

I just realized that I'm lesbian. I'm already 27 and feel weird about realizing this only so late in my life. I have Social Anxiety Disorder which has largely kept me a way from a normal social life and dating. I've also suffered from depression a lot. I started to get treatment for my anxiety and depression lately, and as my condition improved I can now think about dating and a relationship, and I feel I'm simply not attracted to men but that I've actually always liked girls but used to suppress my feelings and didn't see them as what they were. Like there was a girl in my class that I actually really was in love with but I tried to see it a way as if I just really wanted to be best friends with her. I've never been attracted to men sexually but given my social anxiety, it felt easiest to just be celibate. I had two short-lived and unhappy sexual relationships with men, but feel I only slept with them because I didn't want to be alone and hate the memory of it. I grew up in a very homophobic environment in which homosexuality was simply treated as non-existent. I want to talk to someone about my feelings but don't know how. Although I'm already 27 I feel in a way as if I just hit puberty.