Change is inevitable. No matter what you do, you will, at some point (and probably at many points) experience change. Whether it’s good or bad, you will have to deal with it and, even when change is a good thing, you might find it difficult to accept it.
Personally, I struggle with change. Even good change can be tricky for me to deal with. For example, about six months ago I left my job to focus on my site, PositivelyPresent.com, full time. I initiated this change—and was thrilled about it—but it was still a struggle to get used to the idea that I would be in control of my own business.