marriage repair?

I'm Mackenzie, 21 been married little over 3 years now. my husband is 22 (highschool sweathearts). Recently I found out he had slept with another girl. I'm sooo embarrassingly in love with him. hes always been so sweet to me, and hes saying he'll do anything and that he's going to change. I'm moving out and we go to counseling. I have no fucking clue what I'm doing , what I need to do, what I want to do. I feel pathetic because right now I miss him, and want to just give in and forgive and be with him 😯