oh man what are you worried about.?? really, so a girl who came over when she knew this was going to happen, and then say "were friends" in between french kisses really means it...haha hell no. Thats like a girl saying im a virgin while fucking. haha All she is basically saying is that you are starting to be submissive and that you need to be more of a alpha male and keep the interest going.
Ok so some good advice is start hanging out with her around friends. stop doing the one on one for a little bit. Then when your with her up the sexual Tension like crazy and make her want it. Cause she is starting to put you into the friend zone but your not in there yet. Setup a night where you and a lot of friends chill and drink and hang out. When she gets there ignore her for a little. Nothing too long. But then once she starts to get relaxed go over and say hey and like kiss her on her neck or the spot where the neck meets the collar bone. this is a very sexual area. and then go hang out some more. Then keep doing things to make her think about fucking. Once she starts getting all over you return the favor a little bit. Pull her aside/Isolate her and make out a little and then she will get really fucking horny. And when she isolates you so you guys fuck, start making out and fooling around with foreplay and then return the message. Tell her you cant lead her on cause we have to be friends. this will basically tell her that your a prize and she has to work to keep you as friends with benefits or keep you at all.
Yeah what you basically want to do is get her to want you really bad like twice and return the message, but make sure you have the right tone and right energy so it doesnt make her mad. You just want her to rethink things and regret trying to say you guys were friends. Remember your a prize make sure to remind her that.