You had a great relationship. You trusted him. You never doubted him once.
He spoiled that and it sounds as if he is genuinely sorry, but you have to face your feelings. If you don't, they will surface every time you have a disagreement, every time he is late home, every time a woman looks at him.
You love him and you sound as if you really can overcome this, but you can't just pretend that it never happened. It did and you will have to try to come to terms with that.
He has to earn your trust again and you have to give yourself time.
