Why can’t I get over him?

Okay so, I recently had to block this guy because he was so toxic and I liked him a lot but he do want a relationship all he wanted from me was sexual stuff and we were talking off and on for about 4 years and I finally blocked all of his socials because he would always get involved sexually with someone else and then remove me on Snapchat but I still miss him and like him even though we had a situationship and I cared and depended on his response and he would always make me cry it didn’t matter because I had him to talk to but I still CANNOT get over him.

Why can’t I get over him?
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