I recommend that you take out the following quote and email him back. Put the quote about how he said he will never lie to you again in the email or letter. NOW is the time to vent to him and let him have some idea of how angry this has made you... NOW...
Do NOT tell him what you are thinking or if you will reconcile. First let him tell you about OW and also why he will never do this again.
Quote:
I have lied to you and promise to never do it again.
Here is an example of how you want to come across to him. This should pull out from him what is happening with the OW. It doesn't matter what is going on with them right now, but you still want to come across as that you know he is still with her and hasn't told her the truth either... Then you let him have it for promising how honest he will always be.. while he is still being dishonest with the OW... If he is truly wanting honesty and making changes, then he will get your drift and dump her.
Quote:
Dear Tunechanger (exbf), Since you are never going to lie to me again, what is the reason you are still with the OW if you love me so much? Going to keep her hanging on to see if I take you back before you tell her the truth? Or are you now lying to her like you have all along to me? Or are you still with her because it is "easier?"
I wonder if you are now going to try to be someone you aren't. NOW you say you will be honest. NOW you say you will communicate. NOW you say you lied.
It wasn't who you were when we were together before. I want someone who isn't trying to be someone they aren't. I want to be with someone who can and wants to communicate and doesn't have to work at being honest, but is an honest person by nature. I want someone that I trust. I no longer trust you. You haven't even broken up with OW and here you are doing the same thing to her and yet telling me you won't do it to me again. Do you not see how that makes you look?
He has pushed himself into a corner now by telling you he will never lie to you again. Bring that out and then hit him hard with why would he still be with the OW if he loves you so much and you are his best friend. What kind of friends do that???..... **** DO NOT tell him that he needs to get rid of her before you take him back. YOU NEED him to do it without you promising anything to him. If he dumps her without knowing whether or not you will take him back, then it shows how serious he is. If not.. Oh, well.. If he can't do it without a safety net... then you still hold the line....