There is nothing you can do to fix him. Your job is to support him. There is a HUGE difference between fixing and supporting. He needs to be the one who initiates getting help. The alcohol may be an issue as well. So many people are completely blind to the alcohol issue, thinking "oh, its only a few drinks, no big deal". Well, speaking as someone who used to go head to head with my best friend in downing a bottle of vodka, shot for shot, but can't even tolerate half a beer without going into a sheer state of panic, don't ever fall into the "its only a little so it can't be a big deal" sand trap. A little bit can be a HUGE deal for some, whereas others can drink a bit more and be fine.

Urge him to seek out help on his own. You can't fix this, but you can support him in fixing himself.