I cheated on my boyfriend and the guilt is eating me alive

I fucked up so terribly. I love my boyfriend more than anything, and in a drunken night I hooked up with one of his friends. I feel so much shame and need to get this off my chest. I hate myself so much. I’m so sorry for what I’ve done and I don’t think he’ll ever forgive me. I told him today and he’s understandably so hurt and upset. he’s my world and I can’t ever forgive myself for what I’ve done. I hope he can forgive me. I just needed to vent. thank you.