Fucking my ex boyfriends best friend help!

Ok so I finally broke up with my abusive ex boyfriend and we were with each other for ALMOST A YEAR and talked FOREVER and I thought I was in love and ofc I lost my v card to him I don’t regret it but it does suck he had to get abusive. But that ANOTHER STORY so I went on a walk with my friend (ex boyfriends best friend) and after we were done we made out and it was good tbh I’m not about to lie I’m not looking for a relationship so what’s better than a fuck buddy right... but I’m just really scared to become fuck buddies with him because then I would have 2 bodies (meaning the amount of guys I slept with) and I really want to but am scared please give me your HONEST OPINION AGAIN HONEST