if your suppose to hang out, and she asks to you come hang out with her friends.
Most Helpful Girl
She may be "nervous" and prefers to have it be a group thing, wants to see how you get along with her friends.
she could just want to keep things on a friend level for now.
(That's why I would include friends/make it a group thing).
I can understand if you were nervous/felt pressure but just have fun and show them how fun you can be around all of them.0