I sympathize with what the OP says. I myself have had some trouble fitting in with some people in the lesbian community. I've had women tell me that the fact that I don't drink, smoke, and am waiting to have sex till marriage was a deal-breaker for being friends with them. I was very involved in the lgbt group at a uni I attended but, at first, it was very hard. I didn't fit in at all, plus I was really shy. Eventually, I found my niche and discovered a great core of friends. I learned a lot from all of the people in the club, even the ones I thought I had nothing in common with. So don't give up!