Alcohol issues

My ex and I were together for two years, I broke it off because there was just a lot of dumb arguments. Hardest decision of my life, we were so in love just started becoming very stressed towards the end which would make us take it out on each other. I never moved on, I honestly just couldn’t recently he reached out and man does it feel great.

We’re trying to rekindle the thing is I noticed he drinks so much now. He hardly drank before I was more the “drinking” one but when we broke up I got into fitness so I cut it out, not completely. When we go out he doesn’t stop ordering drinks and I didn’t think anything about it a first until he’d make comments saying “I can’t have fun just being sober when we do things” I asked him like what was up? He never drank like this and he told me after I left him he fell into deep depression and turned to alcohol. I believe him because he never drank like this and now I’m worried. I don’t like seeing him like this and I don’t know what to do now