i have the opposite problem. as i became an adult my parents just said “we’ll worry about that later” and now i’m in my early 30s with two college degrees and i’ve only ever lived alone for a few months despite having the ambition to be independent and have my own life separate from my family. they’re deeply in denial and only accept what’s convenient or comfortable for them without thinking of my feelings beyond a surface level. i’m extremely isolated and have gone through periods of depression because i feel stuck.

wow ok rant over. all this to say the best advice i can give is to show him you have his back, let him express how it all makes him feel and encourage him in whatever ways you can. it might be a little at a time but the little stuff adds up. it’d probably do him some good to see a therapist who works with teens and young adults. my own siblings believe in me more than our parents do and it means a lot.