Maybe he just didn’t want to burden you and feels shamed that he had a setback.  Maybe he fears intimacy. Being at the facility there was lack of privacy, therefore, he felt safe and now that he’s on his own, he’s fearful of being alone with a woman. I wouldn’t take his actions personally. It probably has nothing to do with you but what he’s going through personally. We’re speculating not knowing what’s going on with him.  You did your best by trying to reach out and that’s all you can do. In the meantime, I would focus on you.  Best of luck.