he forgot my birthday

I've given up on doing anything special for my birthday because plans with friends always fail. it's either they're too busy or something came up. I got tired of feeling sad about that so I don't push anything anymore. somehow, I still expected my partner to at least send me a happy birthday message. He texted me late last night to say he thought it was month end. I don't know why I even expect this much. I was annoyed with him but now I'm just numb about everything. I feel like it's such an irrelevant day that no one can take 2 minutes out of their day for. This year I planned to treat myself by myself but honestly I'm no longer in a celebratory mood. I'm back at that place where I realized birthday plans with people don't follow through and I'm sad about it all over again.