It sounds like you've already decided what to to which is great!
My husband went to a stag do (bachelor party) this weekend. Two nights of drinking and gambling at casinos with the guys. When he got home yesterday morning, he stuck to lying on the sofa drinking water and watching movies, complaining about how rotten he felt.
All I could do was think 'If I still drank, what would be the difference in this scenario?'
The difference would be that if I were hungover like him, I'd have started drinking from about 11am to bury that hangover asap. You know, just the one or two mimosas to feel a bit better. Oh, but one turns into the whole bottle. Then hey, I feel great and it's a sunny afternoon! Why not crack open the rum and start having a few rum and cokes. Haha I'm all drunk and giggly now, this is great! Oh my God it's Monday morning and I feel like I'm dying and don't remember anything from yesterday.'
The difference is he is someone who drinks on occasion and gets drunk maybe once or twice a year at an event. I am an alcoholic and once I start that party it's not going to end until I physically can't drink another drink.