Personally, I don't celebrate my birthdays. I haven't actually since I was probably 10 years old or so. Only my parents, brothers, and sisters remember my birthday, and they say basically "Happy birthday" over the phone or with a text message. I don't have friends to remember my birthday. That's why maybe I don't pay attention to my birthday, and consider it just as another day. But it's just me. However, I can imagine how it feels when there is a social occasion and you don't feel happy. It's overwhelming.