sooooo

So I use to cut .. and be balimic but I over came it !! And became happy with my self! But this current relationship I'm in idk I don't know if he does it on purpose but he loves to point out my insecurities and bring me down and constantly hurt me and it just bring me back to that dark place .. but he also knows how to lift me up when I get that way cause he knows about my past .. so that's where I get confused cause I don't understand why he does it ..!?