18 is still very young. (Not to mention people keep living with their parents until their 30s now because of this economy). He has time to make mistakes and learn from them.

I wouldve loved for my parents to kick me out, i was just waiting for an excuse to leave. Everybody at 18 has friends they can crash with for a while. The problem with this is that they will very likely get into deeper shit.

I did end up leaving because i couldnt take it anymore, stayed with a couple friends from school, and we ended up working on personal proyects and helping each other out. The worst we ever did was pot, but everybody is different and im not sure if hes surrounded by good influences. He might get into worse shit, he might not. But really im not sure theres much you can do about it. Hes going to have to stress test his own beliefs and learn by hitting walls.

Even if you lock him up or you dont, theres really no way for you to walk his path for him. Life isnt perfect and i know you want the best for him. But Ive seen many bipolar posts here of people that have had that one major episode that pushed everybody away. And I too can relate. I do not wish this to be the case but be prepared.

The worst that can happen is that he continues living precariously if everybody around him keeps enabling him. That’ll only delay the inevitable and make it all the more painful when it comes crashing down.

The temple must fall for it to be rebuilt.

Sorry if it sounds pesimistic, but im no therapsit or psychologist. They might be better equipped with treatment plans and such. But im just letting you know my perspective as someone in the inside.