<human>: I've been dating this guy long distance for 2 years. And planned on staying with him long term in his hometown. But he did some things to betray my trust and I've been wanting to break things off for months now. He's very depressed, has a temper. And is very spiteful, even revengeful.

But I'm terrified. He has some pictures of me (clothed) and some sexual in nature text messages. I mean, we were very close for a long time. I trusted him. But he changed. I'm afraid he will try to do things to hurt me. Like send them to new guys I date or try to ruin any relationships I have. I want to change my number right after. I do this but I dont want to provoke anything. I'm afraid he will ask people why or talk to them about me in general. I just want him gone. I cry over this all of the time.

Can someone help me come up with a good message to give him? Should I change my number? Should I block his? I don't want him contacting me or my friends on social media. I don't know how to do this without provoking something.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: afraid to break up with a guy that gets angry and says things that lead me to believe he will be spiteful.