Lol, i've always thought she was a typical choosy, immature, emotionally crippled and confused, hormonal teenage girl.
Alot of girls are like this, they look at things with their "logic" and basically treat everyone around them as being either not good enough and rude/mean/insensitive/misunderstanding of them or clingy/needy/too nice. They push people away when things get real and then they go into "nice girl" mode when everything is rosy and out of the real world. Or they do what bree does and just take everyone for granted, aka Jonas and Daniel being treated like servants to her whims.
She needs someone to come along and treat her like @#%^ so that she can appreciate who her friends really are, oh wait, that already happened because the ungrateful little witch has been betrayed by gemma and her "helper" Lucy, shortly after which Daniel and Jonas took their cue (sp?) and basically saved her from actually having to grow the @#%~ up and deal with her own ish.
Bree's character is headed for major loss of fan base, wish i could actually say i cared cause i've been less than fond of her since the first few episodes: "oh my god daniel kissed me, instead of dealing with it let's bottle up our feelings and intellectualise things, calling others needy and poor judges of meaning when i begged him to come to me and made him leave behind his life!
"
Peace