You and other friends will be forced to accept her into your social circle, but will talk mass loads of shit on her whenever you get the chance.
"Hey bro, you still drinking with us this weekend?"
"Can't dude, I have to hang out with Carly."
"But broski, you've hung out with her everyday for six days now- Whatever, just bring her with."
"She doesn't want too, dude, sorry."