I really don't get the main character's whole deal. I mean, at the start, she's having sex with strangers to kill her cravings, and what she's getting out of that is depression, emptiness and self-loathing. So now she's getting pursued--and laid--by someone who is not only gorgeous and into her, but because of their long relationship when the girl was a kid, one of the few people she can really trust not to be using her.
And she's spending a ton of energy rejecting this because apparently she's afraid this will totally disrupt her previous lifestyle--she might lose all that depression, emptiness and self-loathing and perhaps even be . . . happy, and then where would she be?! Maybe it's just me, but I'm not seeing a down side here, or what she has to lose.