I need ex boyfriend help?

So me and my boyfriend broke up in early march and for about a month or so I did the wrong thing and was throwing myself and begging him to come back. Having the upper hand, he used this against me and just hurt me more. Well since I've gotten over him we haven't talked in a few months but he messaged me on facebook and we got in an argument over a rumor being spread about me. While we were arguing he tries to make small talk with me and I told him to "leave me the hell alone" and then I blocked him on facebook and one of his friends that happens to be a girl added me on facebook. I have never met her and they are family friends. (I know that they aren't dating cuz she lives very far away) and I asked some of my bffs about it and they said its not just coincidence but he's trying to snoop on me through her.. And then he went and liked a few of my instagram photos knowing that I would then go look at his profile only to see that he's deleted all of the pics of me and him knowing it would kill me. What do you think he's doing? Does he miss me? What should I do??