As hard as it is, you need to pack up all memories of this man. It is much easier to let go and move on with your life if you don't have things sitting around that will make you think of him all the time. It is hard at first but you will find it does help.
You need to stop dwelling on him. Stop asking the "what ifs", stop wondering why he doesn't call. In plain words anything to do with him.....STOP DOING IT!!! You won't get over him in one day or even one week, it takes time. BUT you have to want to let go. It isn't healthy to keep hanging on.
I know you can do this. Once you get everything packed away then start out by trying to keep busy and not think about him for an hour, then move up to 2 hours, then 3, etc.... You will be surprised how fast you stop thinking about him all the time. You will be a happier person too. It will get to the point where you won't care what he does or anything about him.
Yesterday was my birthday and it is the first time in 21 years that my stbxh did not call or text me to say happy birthday to me. His birthday was Saturday and I did send him a text but didn't get a thank you or anything so I knew not to expect anything yesterday. Did it sting? Yes but that is ok. I'm better off without him. Did I dwell on it? Nope! Not worth it. Better to just move on and not worry about it. A year ago I would have cried my eyes out all day and been miserable. Not now. So you see, it is all in how you want to live your life.
Let him go. Let that part of your life go and move forward to a better one. I want to see you happy all the time without all the questions you have. You can do it!! I have faith in you.