You got upset at her because she went drinking? .......... You guys are at partying age, you're going to be partying and usually partying involves drinking. Why don't you have a drink yourself and lighten the **** up? Better yet, why don't you guys drink together and have a good time? Sheeesh. Yeah, you ****ed up.
I will do my best to reply with an educated, humble and honest answer. Ultimately, it is up to you whether you want to listen to my advice or ignore it completely. Sometimes, my advice may be wrong; occasionally, it will be right. Regardless, I want to do my best to give people answers they are seeking.