有人说我有公主病告诉他病是我惯的

Somebody accuses me of having a princess mentality, please tell them I'm just used to it. Here, the word '公主病(gōngzhǔbìng)' means 'princess syndrome', referring to being entitled and demanding without consideration for others. Instead of denying or arguing about it, this statement reveals a sort of indifference and acceptance. Even though it's a flaw, the possessor has already gotten accustomed to this character trait.