Generally speaking people don't change unless (they) are unhappy with the results they're getting. In other instances change may be forced upon them such as getting laid off from a job or having a mate/spouse leave them.
Most people eventually adapt to change that (happens) to them. The most difficult thing however is for a person to (implement) change for themselves.
It's hard to break old habits and create new ones. One truly has to want something bad enough to commit to doing things differently.
Whether change happens outside of your control or because you decided to make changes; every ending is a new beginning.
The positive thing about change is it offers one an opportunity to grow or evolve as they learn new things about themselves and what they are capable of. The negative thing is the depression and frustration that kills one's joy whenever they attempt to resist change.
You have to learn to go with the flow. You can't allow change to cause you to fall into despair. Keep things in perspective!
Today is just one page in one chapter within your book of your life. Always have the courage to turn to the next page.
No truer words were ever spoken than the lyrics of the song "Everything Must Change" Written by, Benard Ighner.
"Everything must change, Nothing stays the same
Everyone will change, No one stays the same
The young become the old
Mysteries do unfold
Cause that's the way of time, Nothing and no one goes unchanged.."
As you stated (change is inevitable) we must learn to accept it.