No big deal. Mom inquired further. Sue came to her buddy s rescue as best friends are supposed to. He s kinda small, so she must have just overlooked him. As a metter of fact that's how I gathered most information about the plot.
Teenagers use a TV variation language.
If the writer serves me too many - I skip them. They are not vital to the plot anyway. The same conversation could take place in the empty school parking lot with girls just standing there, facing each other. Your story is human relationship, not where precisely falls the lock of hair. I thing you should go for absolute simplicity, so you can go all flowery when you DO need it for a plot.