What is he trying to say? And what should I do about her? [REPOST]?

I don't know.... Maybe he's just a friend, and he's not trying to say anything... But I'm not sure. And about the poserfriend, just go up to her and yell "Stop being such a fricken poser!" and then walk away (if she's not a BEST friend) and she'll know that other people are noticing her poserness, and she'll quit. Hope I kinda helped :)