Was I Too Harsh Here?

[BackInTheGame78]

Fair enough, but in this case I got to smash her loads of times so there was at least attraction on her part

If I hadn't have smashed, then it would have been a waste of time going for FWB. Having already done so meant it was still possible.

Just leave the door open with her and say something like

"I respect your decision, hit me up if you change your mind".

Maybe she will, maybe she won't, but at least you've left the door open.

Then go on about your life and work on getting other women and she is done to you unless she reaches out.