My boyfriend said to me: What does he mean by afraid of disappointing me?

It can only show that the boyfriend doesn't really love you, which is also a disguised way of breaking up.

Boyfriend doesn't want to be responsible for you, so he wants you to quit voluntarily, so he can easily dump you without taking any responsibility. If his boyfriend really loves you, he won't say such a thing to you. He will treat you wholeheartedly without any disappointment! I hope you can figure it out for yourself, and you'd better not waste too much emotion on such a man.