What should you do if you are tired of living?

Acknowledge that recent circumstances have caused you to feel depression.  You'd likely benefit from talking to a Crisis Hotline & seeing your doctor about therapies or medication that can help you though what is almost surely an ephemeral feeling.    

When you are absolutely and positively sure you have nothing left to live for anymore and will not be missed by anyone... that's when it's perfectly fine to just die. I am only still alive because I still have one mission to accomplish... and that's to find my cowgirl and the man who took her and raped her. He's on borrowed time and has no clue either. 

Keep living....... 

Plan something you would usually enjoy, even if you don't feel like doing it now. Sorry about your father.

change your attitude !!! ......................

Everybody gets down when they lose someone close.  Thats just part of life, go outside for a walk, get some exercise, just sitting inside makes you think about it more.

Suck it up buttercup