I am so sorry you are going through this. In a way it does sound like your son is depressed and/or is suffering from depression. He is also at an age in his life where he wants to be independent. The way that he is going about it may not be appropriate right now, and it is alright if you do not agree with it, but he does need to find his own way. I think it would be a good idea to see a counselor or therapist yourself, so that you will be better able to deal with your son running away and know how to respond to him when he does call or if he comes to visit. If communication between you and him get any better I would suggest that he also goes to therapy and eventually, you may have to go together. I hope everything works out.
I don't know how this got into parenting, it was sent , I though, to mental health and the mental health councelor who had been working with us, Elliott Sewell. If you are able , somehow I don't know, how , can you refer this back to him ? I am very aware that we can use some emotional comfort and help at this point, but as a parent, kids need to be taught that life is too short to make all your own mistakes or you end up living a life of continual distress from all the mistakes that keep being made. I have raised 3 generations so I have some practical knowledge about what works and what does not, at least a little. I suggest he goes into therapy also but he has no funds, no money, no insurance, and wouldn't have the least idea of how to even if he were willing. Thank you but this was not meant for parenting .
I will see if I can send it back. Hope everything works out!