Should I take him back?

I was his second choice and I don't like that.Well , my names Roxy. His names Michael. We been dating for 3 years..How can it all just fade away.He started lieing to me.He told his friends he would dumb me . And I found out about it ,hes all like I changed my mind. And we started fighting bc I wouldent believe him.Then get this he faked a panic attack...Then on the 4th of July he called me a bytch n said he never knew why he ever loved me. And that hurt me bad.So I told him to go find another girl because it was over.And he did the other girls name was Madison. I been so happy ever scince me and him broke up. I feel free. I told him I always loved him and never wanted this too happen.But then my sister is trying to get me bac with him. He wants to date me again only because Madison turned him down. And im noones 2nd choice. And I think where better off friends. Hes very mean to me , when were dating. And someone already asked me out. So I told them I had to think about it. If i redate Michael ill hurt the other dude. And I'm not happy with Michael. What do I tell him???