I know it's hard when you still have feelings there and you generally care about him. I think we all care about our exes and I understand the concern. He may end up going down a bad path or he may straighten up and better his life but it is out of anyone's control except him (and God if you're religious). Maybe he will realize if he is out being wreckless or into drugs or something he may realize he is hurting his family. There is no way to really tell but it's better for you to keep on going with your life and your happiness. I know we all can't really help but wonder but in the end it will be alright.