Why does he want me to forgive him?

my ex and i broke up six months ago because i found out he had been cheating and put my health at risk. We stopped talking after like two months ago after we had a big dispute. Every single time we talk, we get into a fight and it ends up in terrible name calling. I thought he had moved on and forgot about me. He messaged me a few days ago and I replied. About the next day we got into an argument and had been arguing days later. He told me how much he dislikes me and calling me all sorts of names. He mad at me for not forgiving him but also mad at me for still being mad at him. Even when we weren't talking and its been months I can't get it out of my mind what he's done. I wake up thinking about it and go to sleep thinking about it. At one point I forgot about it but it all came back. He's been wanting to call a truce and wants me to forgive him so that we can be cool and go our separate ways. The more I bring up the past and don't forgive the madder he gets. So far I've been making him angry and he brags about how since the break up he's still sleeping around with other girls since then and that he has a bag of condoms and bragged about how half the bag is already gone (sends me a pic too of it). I don't get why he would want a truce if he is sleeping around still and living his best life. why does he want me to forgive him?

Why does he want me to forgive him?
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