You say you want to save the relationship. There isn't a relationship when a person cheats on their SO, whether it's a gf, bf, wife or husband it doesn't matter, cheating removes the trust from the relationship and makes it very difficult for the other person to truly trust them again. Thing is, if he's capable of cheating on you and interested in casual sex then he needs to be single. You can't have a gf and expect to keep your casual sex life too. it just doesn't work that way. I think very lowly of men that are capable of what this guy did. He said it was just fellatio. wtf? Sex, oral, or intercourse or foreplay is all the same, still cheating as much as the rest. I don't get the mentality that if you just did oral.. that it's not sex or cheating. That's the lamest excuse Ive ever heard. Heck if he just kissed her he cheated on you. Period, no two ways about it. That's bullsh!t.

As for you, You have every right to still be reserved about it. Sometimes this can take years to get over. He betrayed you in the worst way possible. Even if he were remorseful, repentant and did everything he could to regain your trust and prove he was faithful to you from here on out, I guarantee it would take you a long time to get over.

I commend you for trying to forgive him but don't be a doormat. If he is continuing or even wants to brush this off as a small thing, I think you can do better than this guy. There are plenty of guys out there that would be faithful and true, they are just not as obvious as the ones wanting casual relationships because they are careful and look for the right one for them so tend to wait instead of flaunting themselves or throwing themselves at the world looking for a mate.

Hang in there. My heart goes out to you, because I've been there and been cheated on too. *many hugs*