If it's your birthday then:
Happy Birthday

I know you're probably feeling sad and won't want to celebrate. That's okay. I get that feeling too. But, if you can, understand you're a human and that means you deserve a little happiness just like everyone else.

If you want how about posting about one nice you're going to do for yourself on your birthday.

I've done mine already - a Radox shower. I know exciting, but I smell nicer now.