it's not about hurting YOU...he's not drinking AT you or to hurt you. in fact, you aren't even part of the equation.
help is available. treatment centers are thriving, AA and NA meetings are in every corner of the planet. this is a battle he's been engaged in for a long time, not just since you showed up. and it remains his battle to fight now.
from what you shared, you really didn't KNOW this guy much at all. he showed you what he wanted you to see, and you saw what you wanted to see. i doubt this is the first time he's pulled this stunt. and i doubt it's the last!!!
it didn't work out. he wasn't a viable pick. he wasn't who you thought he was, by any stretch of the imagination. now you know that and you can move on.