What should I do about my ex boyfriend situation?

I am in a lost with my personal life and what to do. I have plenty options open for me to consider (and have been) but there is this one particular guy who stands out the most. I dated him for 3 years, with the last year that fell apart. After I left him, he has tried convincing me that he has changed and for the better. Every single day for the last 2 months we’ve talked and spilled out our feelings. However, I have insiders who have proved to me that he has tried hooking up with multiple women and still proceed to talk to them, while trying to get back with me. I don’t know if he’s serious about getting back together and is just using these women to feel better about himself or simply try to get over me but I don’t know what to do. I would like to give us another chance, however, I’m afraid he won’t stop talking to these other women and if he’s truly serious about a restart in our relationship. Has anyone experienced this same situation? And, what was the outcome?