'Effin 'ell! I know you know how to take care of yourself, but... please be careful. He doesn't have reliable wheels, yes, but that doesn't bar him from hitch hiking. I don't know how his mental illness drives him, but he might go to lengths well beyond what most people in his position would consider. I don't know what your personal measures are, and it's really none of our business, but I hope you're making it a habit to pack some form of force multiplier.

I'm glad that you've made it as long as you have without communicating with him. You did what YOU could do in trying to get through to him and helping him, now stay strong!