Faith of destiny?

I'm like a fly that is trying to save himself out of a spider web before the spider arrives to eat him. I'm trying to save myself out of every awkward conversation. I'm trying to save myself from the moment I'm going to lose my friends. I'm trying to prepare myself for it, but I can't. Because I don't know if, when, where and how it's going to happen. And that is iritating. Why isn't my life just written in a book called; 'Future of a girl who doesn't know what is going to happen.'
Is everything that is happening faith of destiny? Is it wrong to always think about the bad side, because if it is going well, then the setback is very less.
Does life means making choices or does everything happen by chance? Because if life was about making choices than I could never escape from that spider web. But if everything in life happened by chance than I need a miracle.