You have to move past it, now, not later. What she said hurt, because it's true. She cares for you and doesn't want someone who drinks heavily to be around you. Could she have been a little more discrete with her comment? Sure, but look at her motivations. It was not intended to hurt you, quite the contrary, it was to protect you.
The pain might be coming from the brutal honesty of the moment. Get through this though, immediately. Go hug her and thank her for what she did. Turn this around, despite how much pain that may cause you. It's hard, but this is the road we have ahead of us, lot's of difficult moments and situations to struggle through.
Good luck, don't drink.
