How do you talk to an ex that you haven't talk to in months but you really want to?
I think you talk to an ex that you haven't talked to in months by not bringing up that he was wrong but instead being greatful for him talking to you. Agree with him and work towards accepting your mistakes.
I'm having the same problem and I still have no idea how to fix it. my advice start with a "hi" I tried it today and it brought out a smile