There’s a boy in my theater club who kinda wants nothing to do with me but I still love him as a friend how do I let go

To put it very short and sweet when I entered the Theater club, I met this boy we will call him R. I’m bi (like men more) and he was straight. He inspired me to be better and what not and during my sophomore year I kind of got really close with him because I was friends with a girl that he liked and I told him I will help you no matter what to learn a few hints so you guys could start dating and it worked. I successfully got them to start dating. They like each other very much but then it fell apart after he friend zoned her out of nowhere during Christmas time after sophomore year and I guess, especially after that, our relationship kind of fell apart we still talk but only if you need something from me like food or music. And he found other people that he likes more. And he kind of wants nothing to do with me now, but I still love him to death and treat him as a friend even though he wants nothing to do with me. I don’t know why I haven’t stopped yet. Is it because he helped me when I was in a dark place because he inspires me I don’t know. I miss him dearly as a friend and I wish we hung out more, but I don’t think it’s ever gonna happen again and that sucks for me. And I want to let go, but I can’t.