Hi. I need some advice, but first some backstory.

Long story short. In 2016 I[now 23F] started dating a boy[now 24M] from my class. We started dating when I was in really low point in my life. We were together for almost 4 years. It was okayish relationship, we rarely fought and overall we were fine. The problem was, that I was...not really happy. My mom (53F) never liked him and always called him dumb*ss (not in front of him, but I heard it all the time). She didn't like him, because he is coming from specific family, that have a bad name. My mom knows this environment and resents it. I mention it, because she was important aspect in my growing resentment for him. After 3 years I tried to break up with him, mostly because he never really grasped a concept of consent. It was mostly small things like giving me a present even if I said, that I don't want it (he gave me like 5 brushes, even though I had like 3; touched me even if I say no etc). There were some major incidents, that were really pushing me. I guess I still had some feelings for him, since he managed to convince me to give him a chance that day. The last year of our relationship was the main reason, why I finally stood my ground. I felt manipulated and lied to, mainly because he was studying, but he had school on weekends. I noticed, that he was no more telling me stories about the school, no more whining about the trains etc. I asked him multiple times about it and every single time, he would run away from the conversation. Another aspect was, that he was telling me all about him going to hospital for balloon in the stomach. Guess what. He never went to the hospital to get his balloon. The final blow was when he tried to come with me to a party, that he was not invited to (and he got away with action like this 2 times already). He followed me and we had a big fight, where I just ended it. He was blocking the entrance for half an hour and stopped only when I grabbed my phone. He then proceeded to contact me through our friends. He even came at my house and waited around an hour, waiting for me to go out. Luckily, he stopped after a week.I was no saint in that relationship either. I was a b*ch sometimes and surely was a problem either, so please don't judge him harshly. It's closed chapter just for context here.

Next month (March), I was talking with a friend. She told, me that he gave her the password to his account on an online game, which we were both playing. I was mad, since I literally bought the subscription and paid currency for this account to function. I changed the password and checked the account. I thought he was over with this game and just abandoned the account (the character was proving, that he was not online for that whole month)

He stormed my social media again with threats after 2 weeks (end of March), because something came out in the game and he wanted to buy it. We talked about it "nicely", but he got his account and I unbanned him. Then, some weeks later we just started talking. Mostly playing games together etc. Like with a friend.

Now, we are playing every other day together. I treat him like any other male friend and just don't say a word about past. Unfortunately, he started sending me hearts, emotes with kissing and other gross stuff. He jokes about hugging me and meeting again. He is also calling me pet names. Obviously, I don't want to get back to him. I joke back about getting a girlfriend etc, but then he acts hurt and is still...acting like this. I don't want any huge fight with him, since I've had enough. I don't want to cut him off, since I don't have someone like that to play games with (he is a good shooter and is well organized). What should I do?

PS: Sorry for English, it's not my first, so I may sound like a robot. I will try to respond and explain, if I missed something. Sorry if something is wrong, I post first time.

TL;DR My ex is sending me inappropriate messages and jokes about coming back together. I don't want him back, but I want to still be able to play games with him. What should I do?