Most Helpful Girl
DO tell your girlfriend if you care about her and not want to relieve your guilt, being drunk only brings out the things you would do but don't have the balls to. That's not an excuse, if you're not ready to be 100% committed don't be in a relationship.
Most Helpful Guy
Pay the price she deserves. Tell her. You broke the trust. I personally don't judge. It's not my place to denounce you or wish you harm. You made your choice, you must live with the consequences. Good luck m8