I hope you do celebrate that birthday. Maybe you could buy something or do something that you've been wanting to have or do. If nothing else - pie and ice cream! (Pie > Cake)
The girl...I got nothin' - I like being single, but getting to that point took me a while.
If you do the work now, there will most likely be a girl at some point.
Big congrats on the sober time. It will be better than this, promise. I'm glad you're talking about it. Troubles shared are troubles halved. Or something like that.