Sometimes it's too hard to live.
There's always something worth fighting for. Always. It's impossible not to love something in your life. A person, a thing, a hobby. You only get one life. There's not replay button, you don't get a restart. No "game over, re-spawn in 30 seconds."
It may be hard but it can only get better. Once you're dead, it's over. No where else to go. It's over. Why not explore the boundaries of this world before moving on to the next?