She glared at me but was it flirty?

i should say she does have boyfriend and is my boss (but not for long). we had a discussion the other day and after, I had left earlier, she said bye and was kind of glaring at me while she walked by. I don't know it could've been she was trying to get my attention but she just walked by pretty fast.

She glared at me but was it flirty?
Post Opinion