After he broke up with me, he admitted to stalking my Twitter to see if I had put how I was feeling etc. I hadn't because I knew that it would satisfy him to see how I was feeling and if I tweeted about him. I then started NC without officially letting him know and 2 weeks later he randomly blocks me on Twitter? I have barely posted 3 tweets since the breakup and none of them have been to do with him or anything related so I wouldn't be popping up on his timeline or bothering him at all, he would have gone out of his way to look me up and block me. He also really wanted us to remain close friends and he acts friendly towards me and starts conversations in class. Why has he done this?