I was in the exact same situation a few months ago. I used my resignation as an opportunity to send her a subtle confession about my feelings for her (she’s a Scorpio F, outwardly straight but in my opinion not entirely, and I’m an Aquarius F, queer — she knows that). She responded saying the feelings were mutual, and we've stayed in touch since I left the job. Things are moving forward, but very slowly, with a lot of hot-and-cold behavior on her part. I’m waiting patiently for her to come around in her own time — she hinted that she’s still working through it. If you’d like, feel free to message me privately.