Okay, so today's my birthday but only 2 people said Happy Birthday on facebook.?

It's almst 11:00PM and my birthday is today. I got over 400 friends on facebook and I know alot of them from school. I am friends with at least 10-15 people. But the only people that said happy birthday was my brother and my friend. Not that I am not grateful, but it just makes me feel like I'm such a loner. I don't know why any of my other friends said anything. And next year, I just want to delay my facebook for my birthday and open it up the day after. I'm not much on facebook anyways as I usually talk with friends on the phone, text, or talk in real life. But plenty of people said and sung happy birthday which was very awkward. So, am I a loner and should I erase those posts so people think that it's not my birthday? I don't know maybe I'm just overreacting and I'm a male 17 years old today :D