Sexuality? Clingy or crush?

Everyday I see my friend at school and afterschool we text and call and FaceTime and stay up until we pass out. She’s gay and she had a crush on me (I’ve turned her down before) and we’re close friends til this day. Lately I feel a little differently and I don’t know if maybe I do like her? I only turned her down because even though she is a great person and I love everything about her, I’m not gay/bi/pan. I don’t really have the sexual attraction. I think about her all the time subconscious and conciously. I have dreams about her even though I never have dreams. And when I think about her having a girlfriend, of course I’m happy for her but a little sad because I would miss this relationship we have going on. I want to talk to her all the time and even miss her a little. Am I just a clingy friend or do I have feelings? I don’t know I can’t think and I’m really oblivious..