One of the following would be my response mid eyeroll:
" you seem extremely bored, you're not obligated to stay you know, I wont be offended if you leave right now..."

"omg are you having a seizure??? oh no! my bad you're just rolling your eyes at me AGAIN aren't you?"

"incase nobody has informed you, conversing is a group activity not an individual one. If you find this concept a hard pill to swallow I suggest a voice recorder where you are free to listen to the sound of your own voice as often as you like, WITHOUT people like me to interrupt you"

But ignoring her works too I guess