What’s the deal with my ex?

My ex bf and I broke up a year ago. We met in mental health treatment. He’s a deadbeat dad, an alcoholic, and had just gotten out of jail for assault when we met.

He was very financially draining since he was unemployed and never paid for anything.

Anyway, he recently started smoking crack and he wants me to try it with him. He lost his job and he’s running out of money. He’s getting very pushy in wanting to see me and has been apologizing for breaking up with me.

He was trying to say that he missed me and our relationship. 

I blocked him on all social media and from texting me, but what’s his deal? Is he trying to get me addicted so I’ll pay for crack?