Bf always our drinking. Don't know what to do.

Hi ladies. I please needs some guidance as to what to do about my bf always being out drinking. Tonight he was so drunk when i has to go pick him up at the bar he didn't even know who I am. Always fighting about him going out. Am I being inreasonable as we always use to go out together before i was pregnant. But now he goes out almost every single night and gets so drunk that he can't remember anything the next day.