People will change. You will change. The world around you is constantly changing. But it doesn't mean it's a bad thing. The sooner you accept this the happier you'll be.
Most people are scared of change. They fear the unknown of what the future holds. Or the hold on their current life is so tight that they break when something doesn't go as planned. God will never put you in a situation that you cannot handle. He will never move you to a different place without bringing joy and life.
Change is good. Change opens your eyes to bigger and better things that will come your way. Change makes you focus on what you really want in life. Change makes you see who is really important in your life. Change brings you to expand the horizon on what you can accomplish.
People change either to be in your life or to make room for others to be in it. When someone says you've changed, it's not a bad thing; it simply means you stopped living your life their way. Not everyone you meet is supposed to stay in your life and vice versa.
You change because you grow into the person you're supposed to be. If everyone stayed the same person they were in middle school, we would never be where we are today. God made you, and you are who you're supposed to be, so embrace it.
Everyone has had those "life-changing" moments when you finally come to terms with who you're supposed to be and where you're going. These moments aren't meant for failure. These moments are meant for greatness.
You may think that the change in your life isn't for the good, but God has a plan for you and your life. He will use you to heal and help others while using others to give you strength and life.