Thoughts???

This is kinda long but I would appreciate it if you read it. So when I was 16 I got a message on Facebook from a 26 year old man. He kept saying I was beautiful and just overall was being overly nice. I explained that I didn’t wanna talk because I was underage. He didn’t listen to me and he started talking dirty and sending me pictures of his private parts. I blocked him. A few months later, I noticed he made a Snapchat just to talk to me (so he says), again, I blocked it. I’m 19 now and this has been going on for 3 years. I won’t hear from him for like.. 8 months and he’ll come back with a Snapchat add. He just keeps being overly nice but it’s weird. I told him I was really creeped out by him sending me pics when I was 16 and he said he doesn’t remember me telling him that I was 16. I 100% told me, I remember it like it was yesterday. He keeps asking me to stay over in his place and I’m just weirded out by it.