Let me tell you something else. This friend of your ex knew all along, that you are not right for her. Tell her that you are sorry. Say the following to her and stroke your cock once for every word you say, and don't forget to look at her as often as possible:
"<friend's name>, I am sorry for wasting <ex's name>'s time. She deserves so much better than me. You were right to encourage her to leave me."
Repeat this 3 times.