Ex boyfriend drama

So my ex boyfriend and I broke up about a month ago. I tried to talk to him about getting back together and making it work but he said that he needs time, so I agreed to give him time but now I kinda like my single life and everything I do is a problem to him but I had to remind him that we are not together anymore..so he feels that I'm acting mean or different towards him because there's someone else involved but there's not..what to do?