Snuffing inappropriate crushes is something any mature adult can do.

You completely disengage from her in all manners as much as possible. No more social media following, no more talking about anything outside work.

For sure don't tell her how you feel. Ridiculous.

"I can't not abort." I assume you mean you can abort. Because that's the obvious solution you emotional child. You had your thrill, now be a man and disengage and let it fade. That's what any decent person does once they figure out they are in your spot.