Tell me why?

A lot of times I just don't know why. I am so scared of the future. Sometimes I feel so certain about how things are going to work, and then there are some days where I feel like it could all change in a second. I like some change, others not at all. Some things scare me more than I could ever tell you. I don't know what I would do or how I would even live. I'm so scared of the future sometimes.