I was born February 29th, so I'm looking forward to my 9th birthday next year.
Birthdays, and most other celebrations for that matter, only feel special because they're made to be such a big deal for kids by their parents. As you get older and leave your childhood, you aren't going to get all that extra-special attention so it's normal for the days to not mean as much anymore.
When you get to my age, you'll see that a great birthday is best celebrated alone in the basement, in the dark, drinking whiskey until you black-out.