I don't want to tell you what to do, since I don't know you. But my husband behaved this way off and on our whole 19 year marriage. i should not have stayed with him. I never had a relationship with another man though. To me it was even uncomfortable talking to someone else while married. However, if this started so soon into your marriage, when you should have still been in the "honeymoon period", it doesn't seem like either one of you are wanting a life time commitment. Marriage is hard, really hard! Trust is crucial. Once its broken, getting it back is even harder. I'm not trying to put you down. I truly believe everyone has a right to be happy. Your son is young, it only gets harder when they are older. That's my take on it. For what its worth