I TOTALLY understand this. You are not alone in this feeling. It's just another year that things haven't gotten better and I want out. Did something, in particular, happen on your bday or was it the symbolism of it all?
Usually, the only thing that happens on my birthday is that I go out with some of my cousins or my mom to buy a cake just to sing HappyBirthday to me (I hate it).
I don't like being reminded of my birthday and I don't like being the center of attention, but my parents insist on going out and telling everyone.
This year I stopped them from doing this, so my dad was pissed and said that I am a selfish person for not having an party where people should have fun.
So I said that the birthday is mine and I "celebrate" any way I want.
He started asking me uncomfortable questions and I locked myself in the room. And then he spent the whole day calling me a loser and putting me down in every way possible.
Sometimes I think he's a psychopath. This is routine for me.