Hi!
Happy Eearly Birthday. I can relate my 25th bday was on July 27 which I spend in the hospital with a flare up.
All I wanted to do was drink and party and go clubbing like an normal 25 year old would do. My last 3 bday was spend in the hospital.
So the following weekend when I was feeling better, my bestfriend her bf my fiance and I all went to the water slides, where there was no temptation of alcohol. I had a blast, it was def a bday to remember. Consider something like this.
Just do what is fun to you, you'll forget about alcohol (most of the time, hehe)
Good luck, have fun.. Enjoy your 21st it only last a year!
Keep us posted, let me know what you end up doing!