Maybe it's just the people I am around but birthdays really don't seem to be a big deal once you reach a certain age. I'd likely forget about my own birthday if my family didn't remind me.
Really late edit: After reading through some of the later comments here I want to clarify: I didn't mean to say you have to grow up OP, I was just mentioning my personal experience. If you feel hurt because they forgot your birthday just know that they likely didn't ignore your birthday on purpose. It's an easy thing for a lot of people to forget. In the future I'd recommend just saying something like "hey it's my birthday next week, want to catch a movie?" or something like that. Some of us need the reminder.
Really late edit: After reading through some of the later comments here I want to clarify: I didn't mean to say you have to grow up OP, I was just mentioning my personal experience. If you feel hurt because they forgot your birthday just know that they likely didn't ignore your birthday on purpose. It's an easy thing for a lot of people to forget. In the future I'd recommend just saying something like "hey it's my birthday next week, want to catch a movie?" or something like that. Some of us need the reminder.