How to heal after being discarded

It’s been a few months since my ex discarded me.

Whilst I’ve come a long way and no longer follow him on socials or look, I am still grieving the loss of the relationship.

I still think about him and what he did to me, reasons why he would discard me numerous times throughout the day (as I got no closure), like clockwork. Every time he comes to mind I feel anxious.

I don’t know why this is, or how to stop it. Did anyone else feel what I am?

For context, I am AP with an abandonment wound who was raised by a DA + Narc parent.