she already told Issa she didn’t think it was a good idea to hang with the new girl since she is dating Lawrence..

and of course she feels like a 3rd wheel since Issa is all goofy over her new friend.

I don’t think it’s crazy for her to visually express her displeasure... that’s the part that dude says is acting because the whole point is to shoe you are annoyed physically without expressing if verbally.