Indeed, change is the natural flow of things. It changes around you.
Things change, and when a new door opens you can notice or ignore, you can choose to step into the new doorway or stay outside it.
Not noticing, not walking into the change are choices. Your choices.
Many circumstances you CANNOT change, but you can change yourself.
Your courage is right in there with your fear. Both are there.
Choose courage - because the quality of your life is directly proportional to the uncertainty with which you can live.
Choose the pain of uncertainty, of discipline.
Avoid the pain of regret.
Be happiest - do what most people avoid - be totally courageous and full of faith in life. Avoid what most people do, living in fear.
Step into your future, your joy, your happiness.