Why do i enjoy being used and abused?

in my last relationship, my boyfriend would get angry at me and sometimes get physical but i was never scared or anything, i liked it. and now, i’m practically in love with this boy who’s taken but we talk on the phone and flirt and hook up sometimes but he’s inconcistent with how much attention he pays to me so it’s clear that im just some toy but for some reason i dont mind. he also calls me names sometimes and says he wants to hit me and i just get excited. why is this? whats wrong with me?