Seriously, do NOT try to “fix” your friends/family members/aquaintances who are disabled or chronically ill (whether physically or mentally or otherwise or both)!
Accomodate them. And accept that they might not get better, they might get worse. Don’t get frustrated at them. Don’t expect that your presence or kindness or (worst of all) unwanted advice will “fix” them. Just be there, accomodate them, and accept them and breathe. Relax. It’s not your job to “fix” anyone and neither is it their responsibility to magically get better for your sake or to comfort you.