Me and my ex split around 2 months ago after I found out he was seeing someone else just before we got together and for the first weeks of us being in a relationship, obviously we broke up and I resented him so much but I know miss him more than anything, I can’t get him out of my head I have a constant gut feeling about him so I messaged him to try and talk but he basically said he’s sorry but he’s just trying to focus on himself. But I have a gut feeling that I just shouldn’t move on and I can’t knock it. Is it worth just sticking to it in the hope he changes his mind or go against my head and heart and move on… advice would be much appreciated