This patient support community is for discussions relating to relationships, abstinence, arousal problems, birth control, cohabitation, commitment, communication, couples counseling, desire, sexual technique, and sexually transmitted diseases (STDs).
He's a jerk and I hope you won't tolerate it! If you forgive him and take him back, you are sending the signal that it's okay for him to cheat and he'll only continue. You do deserve better than that!
Your friend saw him warm and fuzzy with other girlfriend at airport and you ask if you we think he's going to cheat again...SNAP OUT OF IT!
He's dishonest, opportunist, unfaithful and playing you both. He doesn't love you, because if he did, he would respect you and never cheat on you, so the answer is dump him as soon as possible, before he dumps you. Also, avoid all the drama that comes with other woman. If you have doubted weather to leave him that means that he has you insecure with low self esteen, which you need to work on. Dump him, show him that he can't play with you or with this other girl.
Although I've never been a fan of hearsay, you have to ask yourself how trusting you are in your friend and the information that she has provided you with revolving around what she apparently saw happen at the airport. However, I would have left him the first time around when after a year of dating this guy, I find out he has a girlfriend that he has apparently been with for four years....? Like I said before -- NEXT!