Yes, I had forgotten to add: He might not feel so overwhelmed with his thoughts if others can help to distract him? At least during his waking hours. Games he likes to play, favorite movies, etc. Probably interactive activities are best; yet, you know him much better than any guess I might make.
(Ooops! MM,I didn'[t mean to state the same. Sorry. Just saw this and edited.))
Again, I totally agree with MM, keep him safe at all times.
Hoping to hear from you.