Basically I've been doing fwb for like half a year at least with a bunch of girls and one of them i've been pretty much fucking consistently for those 6 months. The first time i fucked her I did her for five hours with short breaks and afterwards she said it was the best sex experience she's ever had and she kept that stuff up for a while (trusting that seems like a total trap, but hey it lead to a lot more sex, so i cant complain there). Also she's actually bought sexy outfits, buttplugs, and stuff just to turn me on (like any sane guy i dont pay for a damn thing) and she even knows that I fuck other girls (plate theory) and that she's pretty damn expendable (god i love telling her that). Anyways lately she's started doing this shit where keeps trying to get me to say i'm the best girl she's ever been with. Obviously, i've been telling her stuff like she's going to have to really step it up for that to be the case, teasing, mocking her about it, and letting her know she's totally expendable. She keeps it up non-stop and i'm just wondering what she's hoping to achieve.

Oh and one thing i've been failing to mention is that sex with her is getting to be a bit stale like I used to be able to go 5 hours with her and now i'm going like 2 in a half tops. I figure she's trying to get an easy self-esteem boost and then ditch me once she gets it (typical female using whatever she can to raise herself up and then moving). What's her deal and how am I handling this? She's also stopped spewing that "sex with you is the best ever" stuff recently.

She also says she's not into relationships but she still tries to pull that texting every day crap with me and this needy stuff.

She's also done some pretty sketch shit like cheat on her first boyfriend with her boyfriend's best friend (bragged to me about that) and she's obviously fucked with more than a few guy's minds (she even admitted she gets off to that). I figure a few of those idiots caved and told her she's the best fuck ever so now she just toys with them.