Crush on best friend

I think I have the biggest crush on my female best friend. She’s also my gym mate. We’ve been friends for a few years now and I discovered a few months ago that I really like her. Not just as a friend. The issue is that I am married, living in separate parts of the house, and she has a boyfriend. We went out a couple of months ago to celebrate my birthday, had a few drinks, and I confessed to liking her a lot. She initiated an amazing make-out session that had me wanting more. We made out once more after that on a different day. I don’t think, though, that she feels the same for me as I do for her. The only thing that she said was that she felt something for me. I also don’t want to lose her as a friend. I think that I’ve always liked girls and just realized that I’ve never been sexually attracted to men. I am so confused. Any advice?