Changing attraction

Not sure if i'm venting or looking for advice but if you got advice I'd appreciate it. I used to think i was attracted to women but since being on hrt, it seems like my attraction has just gone and I'm finding myself liking men more, and tbh I think I'm catching feelings for my best friend but to scared to say or do anything about it because we've been friends for years and I guess I don't want to ruin our friendship by saying something, but I'm becoming so nervous being around him to the point I can't even think properly. Also he has been saying hope you sleep well and asking how I slept, he's never really asked stuff like that before, is he just being nice or is he showing interest in me, I'm absolutely terrible when it comes trying to pick up signals like that