what to do?

Hey trying to figure out if I should do this or not..buuuut I still have conversations with my...ex... and I'm thinking about completely cutting contact with this person, because they obviously suck ass, and they think what they did to me can just easily be forgiven, and they are just all in all a toxic, and abusive person...but they always guilt me into feeling bad for them...I really can't take it anymore I hate them deeply, but my biggest problem is if I should finally get my stuff back then cut them off? And their friend too I mean they're nice but being around them makes me think of my ex, and how much I hate them but I feel like that would be fucked up, because it's not their fault my ex is a horrible person...what should I do?