Look, you actually want to live. If you didn't then you hadn't opened this topic here to ask for reasons not to do it.
As has been said, there will be better times, my dad could make me very depressed back when i was about your age, I also had some problems with my mom, but nowadays our relation is absolutely splendid I I am almost ashamed of the things I thought were problems back then. All you have to do is go on, grow up, become a man and don't let these issues bring you down. You could also try to find another hobby, like reading books instead of playing xbox all the time, listening to music you like might also make you happier, sometimes the tricks are really simple, yet very effective and little things can make you happier than what you think is big and important sometimes.