I think I like this guy but ugh idk

We're both 15, and we both liked each other back in October for a while, but he wasn't really sure about anything because I dated someone he's quite close to for 8 months. Everything with me and my ex is fine and we get along really well, and he has said that he'd be fine if I dated the one I like. The only thing is, the guy I like has liked one of his close family friends for ages, and she likes him back, but they both agree that because they live far apart it wouldn't work because of the distance. I am super close with this guy, and I don't really know if I like him or not. Part of me would love to be in a relationship with him but I just really don't want to admit that I could like him. I get jealous when he talks about the girl he likes, but I don't show it. Part of me also worries about him because he knows he'll never be able to date this girl but he just doesn't seem to be moving on, and he's one of my closest friends so I don't want to see him get hurt. At school so many people say that he flirts with me, but I honestly don't know. I can't tell whether I genuinely fancy him or not, and it's just something that's been in the back of my mind for quite a while now and I just needed to get it out tbh😂