perhaps i would would join you 2 ladies in the conversation...<br />
if you want make them feel they belong, then you gotta stay with her like she's a true friend, do not hangout with those so-called "loser cool kids" bullying the weak and innocent. show her that no matter what your social status is [or is so, you don't believe in social statuses] you'll be a true friend in need. don't be blinded by those "loser cool kids" out there. be cautious of their plans.
Just do exactly that. Be there for her. Talk to her.