Do I really have to tell you the difference between sex and a relationship?
What I am saying is that in MY situation, (which is vastly different from any other in ways that I don't really feel like going into) I feel ok about taking back someone who cheated on me. I still love him, he loves me, we've been over the whole situation and trust one another.
If it were with a person who I cared for any less, I may have broken up with them. As it is, I have taken him back, and hopefully we will be happy together in the future.
To be honest, the thing that hurt me more than the actual ACT was who he cheated with. But I consider myself a better person for being able to truly forgive him. He said he's sorry for hurting me and I believe him.