How can i move on!!!!

I M(20) haven't had a crush for a long time and been single my whole life (for context, I’m in my last year, and the last crush I had was in 8th grade). Last semester, I got a crush on a cute girl who is my junior but from a different branch. I sent her a friend request on IG but couldn’t start a conversation. We had a mutual friend, so I asked him to tell her that I had a crush on her and to find out what she thought about it. He talked to her, and she told him that she likes another guy.

So, stopped thinking about her for some time. A week later, she added me to her close friends on IG, which got me really excited. But when I opened it, it was a photo of her kissing her new boyfriend. Seeing that broke me and almost made me cry. I unfollowed her and tried to move on, but I just can’t, because I wasn’t just attracted to her—I was (and still am) in love with her.

Cut to two months after this incident, I suddenly started dreaming about her. I’ve dreamed about her for the last two consecutive days, and it’s really hurting me. I don’t have any friends I can talk to about this. I even tried Hinge, but it’s really not my thing—I deleted it after just two hours.

I REALLY NEED HELP 😭!!!