Let yourself cry. There's no shame in it, and it doesn't need to be able to be reduced to reason or cause. Something wants to come out. Let it!
[Not weird at all that a birthday could trigger sadness -- taking stock is important, but we can also be our own worst enemies. Focus on the journey and how far you've come. And be kind to yourself!]
Me: 46 W: 44 Married: 17 Together 21 D13; S10 BD: 03.03.15 (Not attracted to you) Almost 2 years trying, alone, to save marriage Status now: Divorced (effective 06.13.17)