过于习惯
[guò yú xí guàn]
The phrase '过于习惯' (guoyu xiguan) means 'being overly accustomed.' It suggests someone has gotten so used to a certain person or situation that they feel dependent and unable to adjust without them. It is often used in contexts of nostalgia or when someone is too comfortable with the status quo, even to a point where change feels difficult.