<human>: Summarize the given text in a few sentences.

I turned 21 on November 15, this past Saturday. My boyfriend took me out to dinner and all that. My mom sent a card in the mail, but it wasn't postmarked until after my birthday. No one else remembered. No phone calls, cards or Facebook wall posts.

I know that as you get older you're no longer spoiled with gifts - but I thought people still thought of one another. I keep a calendar of birthdays and always send a card and call, and for some people I still send gifts/flowers. But no one did those things for me.

To add insult to injury, my cousin had a birthday November 12th, three days before mine. She also turned 21 - and it looks like she was overwhelmed by the calls, cards and gifts from family. Both our aunts and grandma sent gifts, many other sent cards. More than a dozen of our extended relatives (to whom we are related equally) posted on her Facebook wall. 

The worst part is that on *my* birthday, my grandma called me to remind me that my cousin's birthday was that week, and tell me I should make sure I give her a call sometime over the weekend since 21 is a big milestone. On *my own* 21st birthday. 

I don't mean to whine - I just want to know: is this actually normal? Do people stop caring about birthdays once you reach this age and my cousin is a special snowflake? Or *do* people worry about birthdays, and I should feel offended?
<bot>: Should I feel hurt that no one except my boyfriend/mom wished me a happy 21st birthday? Or is it pretty normal once you reach this age?