FWB won't leave me alone

I’ve been casually seeing this guy for the past few months. He was my first for everything but I didn’t get emotionally attached because his personality put me off. I forgave him for being an idiot once and I regret it ever since. He kept calling and pressuring to meet so I gave in. Now he doesn’t treat me any better and Im tired. I don’t know if I should cut off contact entirely or answer his calls? I know he’ll try to manipulate me into talking with him somehow and I don’t wanna fall back into this toxic situationship again. He doesn’t want to commit but loves treating me like im his girlfriend and keeping me around. He’s very possessive just because I agreed on having sex with him. He’s immature and I don’t know if it’s worth having a serious conversation with him. At the same time I’m scared if he threatens me with photos because he did once when I tried to leave. Then when I asked him to delete the photos he said he didnt have any because he couldn’t get me to go out with him in any other way. Wtf? I feel like im wasting my time with this dude and I don’t know how to get rid of him.