Special occasions are hard... I would agree 100%. But try to look at the grand scheme of things. Several months apart and missing a birthday is nothing compared to having the rest of your lives together. This is all worth it.
Have you ever tried yoga? I don't know if you're in to that sort of thing... but it was seriously my sanctuary when I was at my worst. I ended every class in tears but felt so genuinely in tune with the universe and living a better life that the pain was so much more bearable. And it just makes your body feel good when you're done.
I feel for ya, girl.
Me: 32 H: 32 M 9 yrs #1 D7 #2 S5 #3 D2 Bomb 8/12/11 H moved out 8/14/11 PA started w/H & OW in 1/12 - found out 3/24/12 Got my own place 8/25/12 H & OW move in together 9/15/12 Still married.