My ex and I ended about six weeks ago, due to lack of trust from our pasts not from our relationship. Also he was under a lot of family stress. However when we were together emotionally and physically we were very close and deep in love it was obvious to us and others. He pulled away when everything started hitting him at home I guess and I was devistated, but let him go. Why does he continue to stay in contact with me and come to see me? It's like he wants me back but he is scared. I try to just be friendly about it, we admit to each other that we can't get over each other and we think about each other everyday but he still has that wall up, I don't understand.

Be his friend and maybe in time he will feel comfortable that whatever circumstances caused him to feel this way to change and maybe want to start over. He may be wanting to make baby steps to work up to a relationship again.
IF you are open to it let things develop from where they are to where ever they go.

My ex and I ended about six weeks ago, due to lack of trust from our pasts not from our relationship. Also he was under a lot of family stress. However when we were together emotionally and physically we were very close and deep in love it was obvious to us and others. He pulled away when everything started hitting him at home I guess and I was devistated, but let him go. Why does he continue to stay in contact with me and come to see me? It's like he wants me back but he is scared. I try to just be friendly about it, we admit to each other that we can't get over each other and we think about each other everyday but he still has that wall up, I don't understand.
My dearest one,
I understand where you are coming from, but ask yourself this question?
Do you prefer waisting your time and trying to fix what the problem really is? Or continue on with life?
You are too smart and still you can't figure it out, I will tell you as my own experience to let him go and move on. He has issues of his own that he must resolve first and then he will realized what he lost but for now you must keep your head up and continue with your things.
Hope everything works out for you!