You are not overreacting. You have reason to be concerned. What he's doing is binge drinking. Lots of people can go for periods of days, weeks, or even months without drinking, but when they do drink, it's to excess and specifically to get drunk.

Given his denial that he has a problem, it's unlikely to get better, and likely to get worse (more frequent, or more drinks on each occassion.)

I'd suggest you seek out the support of an al-anon group. They can provide you with support and information and help you figure out if you want to be in this relationship or not.

This is a situation where you have to put yourself and your well-being first.

splitimage