Check your credit rating. He may have or will continue to use your credit to make bad financial decisions. Buy safety lock insurance if possible. Change your credit card and gas card numbers right away. Check and double check all investments and bank accounts. Call the therapist and his work, yes, his work, and tell them you are no longer a couple. You don't have to say why, just say that you want to make sure than any business having to do with you as a couple is no longer active and needs to be closed. Call the MVD and tell them which cars you own and which ones you don't. Unfortunately, parking tickets are against the car, thus the car's owner, not the driver. Check all accounts having to do with cars and car insurance. Take your name off his, and his name off yours. Make sure, SURE, his car is only registered in his name. There are so many ways these days that a user (regardless of the cause) can continue to wreck havoc with your life, even continuing to cost you money to cover the damage they continue to do in your name or when pretending to still be a couple. Do not ask him about any of this. He will tell lies about all of it. And he IS doing you know what with her. Likely, with several others as well. Take care of yourself. You have a lot of tasks to do.