Devious Journal Entry

So recently I've had many things going wrong. Some of it is small stuff, but some things have had a really big impact on my life. At the moment I just feel like everything I find enjoyable is turning sour. That, or being taken away from me. Every aspect of my life is being slowly poisoned.
My friends.
My family.
My school life.
My home life.
My hobbies.
Yet, and the end of the day, I have to accept it. So many people say that I should be grateful for what I have. And I suppose that's true. So should I be allowed to be sad all the time? or should I be happy and bury that sadness?
Both seem wrong.
...What's the answer?