What does this sentence mean, "I am most afraid of the sudden silence of the air and the sudden concern of my friends"?

When you get used to something, you will be afraid of its sudden change! Just like, you are used to having no friends, and you are used to being alone. Suddenly, someone cares about you and treats you well. You are very happy, but you are afraid that you will suddenly leave if you are serious, and you are afraid that he will betray you! It is also possible that a person's life is too bitter and his spirit has reached an extremely sensitive state. At this time, a friend's comfort is like touching a tight string, which can't be taken back at once.