Hey Im sorry your going through this, but tbh i dont think YOUR doing anything wrong... I just think that you guys can't get things to work out right now. And all relationships aren't perfect. But i think the best thing to do would be to talk to him about everything especially the way you feel. Just keep trying
Aaaand have you ever thought he might be saying these things because he cares about you? That you work to hard for him? That could be a reason...
Good luck friend and welcome to PC