How do you know who is "real"?

[MsFoxyLoxy77]

I was talking to my best friend last night. She's a little uncertain about the people who have been speaking to her. She just became a member of XYZ at the end of this past spring. Now, people who were associates of hers before are now even more friendly towards her. Here's her dilemma: Are these girls being more friendly towards her because they generally have become more interested in being around her? OR Are these girls being more friendly towards her just because they want her to put in a good word for them? My friend is a genuine person and says she would feel at ease if she knew whether or not these girls were interested in XYZ. Nevertheles, she doesn't know if they are interested in XYZ yet. She feels awful for even assuming that these girls have a motive at all. I've know her for years and she's the most down to earth person I know. She's always been outgoing and would hate to associate with people who are treating her better because she's an XYZ when they just said hi and bye to her a year ago.

Does this commonly happen after one becomes greek? Does your first name become Beta Brian or Theta Tiffany? How can you tell who's "real"?