Nope. Not going to happen. OP it sounds like things ended for a reason.

She sounds a lot like an ex-gf of mine. In the months after the breakup I would have taken her back if she had a really good excuse for what she did. But now I have a younger, hotter, thinner, tighter gf and would never leave her for the old gf.

What exactly was "off". You better be able to put iit nto words. Very clear words. Try it here. What was it Op?

You will need the words for him -- in your apology.

I think a lot of it was self sabotage and fearing it failing. We were both previously married. I did share some of that when I originally texted him a couple months ago but do plan to talk more about it and what I have been working on in therapy

This isn't an answer. You don't have a clue. Sounds like therapy nonsense talk.