I need help!

I (16 m) have had a crush on this girl (16 f) for over a year and a half.

I say I need help because we'll I have had a girlfriend for 5 years. Am I just a bad person for having a crush and should I just try to move on? That's what I ask myself a lot but I just can't take my mind off of her. My current relationship has been great and it is probably what everyone wishes for. But from my perspective I feel like it has been toxic. Also my gf is friends with everyone in the school including my crush so I feel like if I do ever break up with her every girl will just hate me and especially my crush. All I really want is just to talk to my crush. I literally can't remember the last time I haven't thought of her.

So anyone have any advice for me please? Or do I just need to get over it?

Also I just wish I had someone to talk to about her cause I can't talk to any of my friends about her.