fracas ...go back and read what you've said and then compare it with your actions.
You made a lot of noise about trying to get yourself in the proper headspace, how you want to get therapy before even talking to her again, make sure you're approaching this clearly, etc., etc. After all that, you did none of those things.
There is no world in which talking to an ex for 3 hours a few days after a breakup that they initiated is in any way giving yourself time. You definitely lied to yourself about wanting to take time for yourself.
You also clearly didn't go to therapy before talking to her so you lied to yourself about that too.
There is no way that you can approach this as a "new" relationship. Neither you nor your ex are machines; the history of this relationship will always exist. You are doing yourself a disservice by not only trying to pretend that it doesn't but also by not removing yourself entirely from a situation that absolutely emotionally gutted you.
You're
saying everything that a person should do after a rough breakup but
doing none of it.
Cut off all contact, get into therapy and take at least 6-8 months just living a full life by yourself. Also, don't say that you appreciate this comment or any of the others like if
you don't follow through on making changes to your life as you yourself said you would. It would once again be a case of saying the right thing but doing the opposite.