Where did "I've been wandering for half my life and just want to be everywhere" come from? What do you mean?

This is an unforgettable passage:

My love is gone, and I have been wandering for half my life. I just want your shadow to accompany me, everywhere! People are alive, their hearts are dead, and they can't bear the blow, not because of cowardice. You don't understand, your departure is a haze that I can't walk out of in my life! Fame and money are only fleeting, and only the closest relatives and love are eternal. No family, and He Huan? Why are you going home? Why do you choose to wander? Because the soul has nowhere to put it! In fact, vagrancy is also a beautiful word. No one bothers you, stop and go, look at flowers and miss you, look at the moon and miss you, play the piano and walk to see you, as if you had never left. This feeling, you are not with me, but everything around me is you!

Source:

Ryan is a tramp in Canada. He graduated from the Royal Canadian Conservatory of Music and is a professor at the Academy of Music Performance. She gave birth to an only child at the age of 26, but her fate was not good. When my daughter was 9 years old, she died in a car accident with her wife. She was sad and desperate. Ryan then gave up his job, gave up his lifelong studies and began to wander. In the video, Ryan plays his own piano music, and the sound of the piano is complaining. My love is gone, and I have been wandering for half my life. I just want your shadow to accompany me everywhere.

Explanation:

From now on, I will wander around the world, asking for nothing but a place to stay.