Why?

Why this thing happen to me now? I just don't fucking get it at all. It was my friends past few days. and now is me. Is this some soft of new air-borne virus? I told myself this semester to worker harder. But now i feel like giving up. But i cannot do so. I cannot abandon my family's faith in me now. I feel that i have been a total asshole. I pull 3 people of my life up. And now i can't even pull myself up this time.I don't even know how the hell i get this though in my mind. I see other people so enjoy doesn't seems to have stress at all. Like my bro. He don't seems to have any stress and pressure even since he started college. Why is this so unfair? i don't get it at all.