The only FU was your apology. You don’t need to apologize for having respect for yourself, being clear with your emotions/intentions, and setting boundaries. It helps to have an abundance mentality. If she starts ghosting you, that’s fine - plenty more fish in the see and love available for you. No need to dread / apologize, it comes off as clingy and not confident.

Good news is you’re not past the point of no return. Things didn’t work out timing wise. It might in the future. Focus on you and maybe you’ll reconnect again when the stars align. I personally wouldn’t initiate any contact for a good while. And then when it feels like history (maybe a couple years), you can respond to her stories if you feel like it and see if things might work out better then.