I see that you found someone; I see you are moving, presumably to live with this one.
I wish you well; I am well. And I am glad we parted ways and stopped making one another miserable in ways we couldn't admit to.
If we spoke, I would tell you it went wrong when I failed to see the difference between my principles and my needs.
I could tell you I still hold a grudge for the way you behaved.
I probably would not tell you that it stings a little, even now, knowing you can attach yourself and grow so close to others, but never to me.
(It is a mutual thing, of course. I will take half the blame, even as I complain.)
You are my first and last case of I-don't-but-I-do. There is security in that, too.