I sense that you are having mixed emotions about this. There is a small part of you that would like to hear from him, yet you are feeling that it was not a solid relationship for the long term. There is a chance that he might contact you at some point, it might not be in the immediate future. If you were to try again it might result in having the same problems resurface. People rarely change all that much. It should be your decision as to what you would want to say if you should hear from him.
If you give it some time, there will be someone else coming into your life who will be a kind and easy going type of person. So you don’t need to be with someone when you aren’t totally happy with that relationship.
Best wishes,