Need advice

Might be a long post but I’m so lost. My ex fiancé and I were on and off for about 5 years. Canceled TWO weddings. He had anger issues, and worked away from home all of the time. He was always playing his video games when he was home and our sex life was basically nonexistent. I met another guy, and decided to break things off with my fiancé because we both told each other we were no longer happy. I ended things and started hanging out with this guy. I did not cheat on him, but he told his entire family I did. The place where I got my wedding dress would no longer hold it so I had to go pick it up. Those brought back so many emotions and we met up to talk about things. Now we’re talking about possibly getting back together. But now his family thinks I’m an awful person and I just don’t know if it’ll be worth it. I guess I’m just looking for someone who was in a situation like this or advice.