The truth is, some people may not listen to you because you took advantage of them or disrespected them or caused trouble. It is hard to persuade such a person.

"Did you really think that
I would really take you back,
Let you back in my heart one more time,
Oh, No, No.
Did you think that I'd still care
That there'd be more feeling there,
Did you think you could walk back in my life.
So you found you miss the love you threw away,
Baby but you found it out too late. Too Late."
From the song 'I Learned From The Best' by Whitney Houston

http://www.youtube.com/watch?v=YFVnVuTcz9I

"Honest men are the soft easy cushions on which knaves repose and fatten."
- Thomas Otway, Venice Preserved