This went a lot better than I expected, no thanks to the teacher tho. He's a good egg to view it that way. It's an inappropriate relationship and he's recognizing that.
The teacher has major personal and relationship issues here. Wanting to bully a student out of petty jelousy is insane. Her partner is a fuckboi and leaves her feeling empty after she thinks about the quality of their relationship. Good on her for wanting to break up with him. Find someone better.
Praying she doesn't use her newly single status as an excuse to groom her student...