Heartbroken 💔

Be
I'm so torn in trying to be understanding but also standing up for myself. 
I'm scared that my SO and now FOB will become an alcoholic. I don't know what to do..
We are both young (I'm 19 & he's 23) but I thought he respected me enough for the ONE thing I asked to matter. No drinking and driving. 
He can't have just one and say no. 
Our relationship has already been reduced to him sleeping on the couch. Tonight because I worried myself until I passed out while he was at a pool hall, knowing he has work in the morning and that well... His pregnant girlfriend is at home. 
Am I being crazy? 😞