Why can’t he stop hurting and using people?

Brittanyroseee
This question surrounds my this guy which i have posted about in the past. Brief history; we began seeing eachother in 2019 when he was in sober living then went to jail in 2020 for 16 months. I was there for him through it all. Gets out, switches up on me and gets back on drug addiction. He has been hopping from girl to girl since he got out in 2021, but we began talking again back in July of this year. He is a mess, on drugs, depressed, may move to Oklahoma to take care of his kid who knows. Anyway, sometimes he will apologize for how he treats me. He admits he comes to me when it’s convenient for him at times, he admitted i was all he had in jail, he admits he's not there for me, and He tells me that he tends to hurt other people and he doesn’t know how to stop, like he will tell me he can’t. He doesn’t want to go to therapy and is trying to detox himself at home. He will try to push me away by saying we should stop talking because all he does is hurt me. The other night he called me and said that he thinks he is the reason for the fuck ups in my life and the reason for my poor mental health. If he is aware of his behavior and how he treats me, and other people why does he continue to do it?
Why can’t he stop hurting and using people?
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