Don't cancel your plans to hang out with your buddies if she wants to hang out; tell her you'll hang out with her if she's free. If you're not actually dating, then you shouldn't be fighting. Well, all of your Romeo-moves have to go out the door at this point, or she'll get the wrong picture.
Look into her eyes when you talk about your hook-up status. Don't get too comfortable. After the jump, 10 women share their thoughts about ex-ing and sex-ing. Sure, it sounds alluring to be in the arms of someone you once shared everything with. You don't have to be too subtle since you should already be pretty comfortable with each other -- just make sure she's feeling it, too.