HELP?! I still can't trust him?!?

Since the contact never really severed between you's,this says there is some sort of bond or unfinished business between you both, But,you need to remain aware of what broke you both apart as well,as that issue is not resolved totally on your part,and obviously cause you hurt,causing the trust issues you now have because of it,it does need to be talked about,communication is very important between two people to resolve the feelings you still have there,as if nothing else that is what friends should be able to do,talk things through when needed.