Always keep that smile on your face, because for someone, you're the most beautiful and special person.
Do something nice for your parents, friends and others, make them feel happy and loved. If you're sad and you don't have anyone to talk to, take your headphones and play your favourite song. Cry.
Tomorrow when you wake up, you'll feel better and only wipes will be proof that you cried last night. And never ever lose your faith in God. Because faith in Him and yourself is safe way to succeed in life.