Please, please, please don't harm yourself! It will get better, it always does.
A friend of mine, when he was 17, was flying high at everything. He was getting good grades, had a great family, had a great girlfriend, had great friends and had a great car. But one day he went to a party with some friends - but didn't have anything to drink as he had to drive home. And as he was driving home, he was hit by another driver.
His car was totalled.
He broke his leg.
His girlfriend dumped him.
His grades suffered.
He lost his friends.
He struggled with sports.
His family was furious with him.
He was so depressed, that he eventually tried to kill himself. He had a skylight from his bedroom and so he tied a rope at the top and a noose at the bottom. He placed his head through the noose and kicked the table her was standing on away. But he hadn't tied the rope at the top properly, and a very short time later, the knot gave way and the rope came crashing down. Even then he thought to himself "I'm such a failure, that I can't even kill myself".
Over time, things started to get a little better; little by little, step by step.
32 years later, he, his wife, his two children, his family and friends are all glad that the rope wasn't tied on properly.