First off, I can't stand him, he broke up with me 2 years ago, he accused me of cheating on him which I never did, and while we were going out he was extremely controlling and didn't let me see my friends. I saw him a year and a half ago and he started an argument with me and blamed me for all his problems up until then, e.g. not getting on with his mum, not getting into the uni he wanted to go to. He even blamed me for him now using cocaine. I refused to speak to him and told him I wasn't responsible for him and he hurt me when we went out, and he laughed at me and told me. I haven't seen him since then, I would be extremely surprised if he didn't know what I think of him, but today he wrote on my wall on facebook (hes not my friend but were in the same network so he can see my profile) he wrote "I do not know what the end is" in french, and then he wrote, "lol, sorry for the graffiti, peace love and trees, sorry if you don't want to talk to me"
I would have thought he would maybe want to apologise not just make no sense? I really don't like him, and he knows it, so am I overreacting? If I do reply, what should I say?