Hi JeepGirl ~ I'm sorry this happened, but if he NEVER met the women, and this happened before you were married, I can't really see this as "cheatiing." He may have had a "silly" type of contact with these women, but I dont' think I'd every call it a relationship. All he was doing, from the sound of it, was TRYING to set up a sexual meeting. This wasn't going to be a relationship.
Honey, do you have any PROOF that he's cheating now? I don't think so. Does he stay out all night, and you don't know where he is? I don't think so. He has apologized over and over for what happened? Probably. Do you think he loves you? Yes, I'm sure of it.
If you keep this up, you're going to push him away, sweetie. By continually believing that he DID cheat, and letting this interfere with your marriage, you're going to let this RUIN your marriage. You CAN'T do this! You have GOT to forgive him, and let the rest GO. You can't bring it up anymore, and you've got to drive these thoughts OUT OF YOUR MIND. They don't mean anything, and they didn't mean anything to HIM. HE LOVES YOU and he married YOU. That should tell you enough.
So forgive, and forget! If you can't forget, then you may regret it. Perhaps you should talk to a psychologist. Have your doctor refer you to a good therapist. I wish you the very best. God bless, sweetie and take care. Hugs, Lee