Bad break up?

Really bad breakup. Advice?

Hello, I’m going through a really horrible breakup and need some advice. My ex and i were together for 4 years. At one point he cheated on me, then lied about it (to this day hasn’t owned up to it). Throughout our relationship he continuously lied to me countless times about other things too. I had very little trust in him but still stayed. I gave him everything and really believed i went to the fullest extent to make him happy and satisfied. I was always loyal and never once did him wrong.

A few weeks ago i had a suspicious feeling something was going on with him at the gym (turns out i was right).. He flipped out over this and said he needed a break. Throughout this break he refused to set any boundaries and then after 2 weeks he officially dumped me. It turns out he had met someone at the gym and is talking to her.

I cut off all contact with him. He showed his true colors and i know i deserve way better. He was very manipulative and made me believe he loved me. This was my first real long term relationship and i have learned so so much from it.

The issue now is he will not stop running his mouth about me. He’s going around to all of our mutual friends calling me crazy and twisting the whole situation. He will go to the farthest extent to make sure everyone believes him and thinks I’m the bad guy. I have lost friends because of this and even my personal trainer who was his trainer as well. I already felt defeated by him leaving me for someone else but the hurt just doesn’t end. I really want to move on with my life and wish he would just leave me alone. I do not want to reach out to him under any circumstances. I think he knows that he’s the one that fucked up and is doing whatever to cover that up. If anyone has any advice how to get through this or if they have ever been through it, it would be greatly appreciated.

Ps. Please don’t tell me i should’ve left sooner. I know i should have, and i wouldn’t be in this mess if i did. Love is very blinding sometimes.