My friend asked me to borrow money, but I didn't want to borrow it because I was short of money. My friends send me messages and call me every day to harass and pester me for permission?

This further shows that you did the right thing! !

Such a friend must have no character, and such a friendship must be short-lived! !

He tried to kidnap you with so-called friendship, and by harassing and pestering you to borrow money, it shows that he has the essential characteristics of "Lao Lai".

Such a person can never lend him money and can never continue to be friends.

Since you have done one thing right, you should continue to do the latter.