Why do I feel "Spooked" by ex?

I broke off a 7 year relationship about 4 months ago. It was tumultuous at times and there were some short "breaks" but we always got back together. I did love him; and he professed to love me but I believed after a while that he was a narc or at least, had many of those tendencies and I couldn't take it anymore.

At first, I didn't hear from him; but about a month later, I did and really didn't reply other than say "I'm rebuilding my life and wish you the best". Then he reached out to me a few other times, the last one being the day before NYE to say it would be the last time I'd hear from him "for the foreseeable future" since he was in a "committed relationship and very happy with someone I know" and "I know you are with someone too since it fell in my lap through Facebook". I didn't reply. His last communication simply said he thought my new profile pic on Facebook was "beautiful" and "take care of yourself." I haven't heard form him since although it's only been a week.

So I made sure he was blocked from my phone, text, Facebook, etc. etc.

I keep on having dreams of him still approaching me and I don't know how to not have these dreams. It's like he is haunting me. Does anyone have any suggestions?