Random advise

Background: I'm 23 with no children and never been married. He's 31 with 2 kids and has an ex-wife.

My SO drinks almost everyday. He was medically discharged from the army about 8 years ago. I'm a pot smoker and so to get us on "even plains" he buys me wine and keeps my bud stash at least half full.

I've been noticing that when he gets upset with me or anytime I leave him home alone, he drinks nonstop until everything in the house is gone and gets into my weed stash as well.

I just think that it's horrible decisions. Any comments, suggestions or advise?