Paul’s concern for the Corinthian church (chapter 12)

Paul reiterated that he would not be a burden to the Corinthians.  He did not want anything from them, just for them to follow Jesus Christ.  Parents should take of children, not vice versa.  Paul loved them more than any other church.  He asked them.  Was he deceitful?  Did he take advantage of them?  Did Titus do something wrong?