As a person whose husband was unfaithful the very first year of our marriage, I can only advise you to get out now. I do not believe in divorce, but how can a marriage be valid when there is infidelity from the start? You can and should forgive, but that does not mean you have to take him back. He is a serial offender and is not yet willing to change because he called the girl again, after you threatened divorce. Don’t delude yourself, there is very little chance he will change. If you decide to stay, he must prove to you he is willing to change. You must require big things, like giving up his cell phone and computer for a period of time, etc. things that are sacrificial so you know he means business. I will say a rosary for you tonight.