Do men come back eventually?

I’ve dying for my ex. We have a 3 year old together. He still likes to bring me around the house, around his kids and spend tome with my daughter and I. I even sleep over but today I have convinced myself that he’s just playing me or he’s confused. I know he’s seeing someone else and seeing Me. I have decided to remove myself from the situation but I am literally heartbroken. Do men come back? I’m going to start doing me. I’m done. I hope one day he regrets it