something to fight for

Recently，I find it more and more difficult for me to concentrate on my study, or even life.I always think things I'm doing now is useless,maybe meanningless.I want to find something that I can fight for .I want to find something that can trigger the passion inside me,if I do have some.I want to be a passionate one ,both to life and to my study ,I want to enjoy my life ,I know every minute I have now will never come back to me again.I should treasure it...