First of all, HAPPY BIRTHDAY! :)
Go to your friends, they'll help you out and comfort you, I hope.
Find something inspiring, avoid thinking about your past and distract yourself from reality.
Watch some humor and inspiring videos and movies.
Go somewhere you want to go, don't let anybody bring you down.
Just don't give up on life just yet, there are a lot of alternatives in this world, travel if you can, find someone to love.
My life used to be this, but I didn't give up when this crossed my mind. I wanted to die back then, but someone stopped me. I hope this happens to you too.
Just don't dwell too much on the past, that will help you, it helped me.