10 days until surgery

So I'm 10 days away from getting banded, and I'm feeling a bit overwhelmed. I know it's the right decision for me, but i'm just going through the motions I think. I worry that even this wont work for me, that I will faill this as i've failed so many diets before. I worry about the situations I will be in (dinner with friends, dates, etc) where I'll have to come up for a reason for not drinking during dinner, reasons for eating such small amounts. I know these things are small and in the big scope of things they are really just small sacrifices, but i'm just being honest, these are the things keeping me up at night.