Start seeing the positive in everything, absolutely everything, be cynical, be loving to yourself. Write down things in a book that you do that make you think, I'm a nice person, I'm a kind person. Read them until you believe it. Find the beauty in yourself, find what makes you different, what makes you worthwhile as family, a friend or more. Be strong, go help out others until you feel happy when you're down. Don't let life get the best of you, go out and have some fun, meet some people, cut out the negativity. It's not the end of your life, you're still young, have some fun while you are. Don't swindle it.