A lot of people go through this stage,sometimes it's like you can't see the good in life and you focus on the bad stuff which feels like it can't be fixed,take it from me no matter how bad things gets there's a light at the end on the tunnel,don't let little things bring you down ,And really think about what everyone else life would be like if you weren't in it you have family and friends that love even when there being a royal pain in the b*tt,they'd be lost without you so please don't think that lifes not worth living because there is and think of all the great experiences you'll have throughout your life ,life is only what you make of it,live life like it's your last enjoy it .

Good Luck and take care