Work romance or move on

Hi
Bit of a head recker for me.
Started working in a Company, normal story boy says hi to girl Sparks fly we started working in the Company at the same time but work in different sections.
You can feel the electricity in the air long stares both ways, smiles you get the picture. When we chat she becomes shy.
She has a bf. I am in a relationship also.
Our company has strict Covid policy so chatting is limited no phone numbers exchanged no improper conversations.
Then out of the blue all contact cut, if I walk in the room she leaves if I walk in the canteen she runs out. I asked to be moved to a different part of the Company at this point, to save any distress or issues arrising.
So I give her as much space as possible, I blank her until she decides to talk or not talk I'm ok with either.
Now she is not running away and now a shy hello thanks if I hold a door open as I was walking through more gentleman things, not making any moves on her.
No she is befriending all the other female workers I'm friendly with.
It's a head recker.
I know guys are going to say your both in relationships. Don't say it I think I know that.
I like the girl and for once font want to do what's right for me, know what the electricity could lead to if the chance arouse.
But for me I can't understand what she is playing at.
I have an idea, she was fighting with her own inner conflict and needed space now she wants to chat again she's jealous when I chat to other women for some reason but won't aproach me for some reason.
Oh as I started this mail I received a text I am now single so that will stop the your in a relationship messages.
Welcome your thoughts.