I honestly think she said that to cover the fact she just doesn't like these particular girls, and who can blame her?
I'm not sure. Not liking any of them? Immediately? I'm not sure I'm buying that.
And my opinion is she fancies tommy, that's why she's spending so much time with him. She picked joe because she's astute enough to go for the safe option and to have been worried about public reaction at the time if she'd dumped him.
I suspect she's one of these girls who just likes Male attention.