Most Helpful Girl
it does kind of sound like she wants the best of both worlds... she wants to have you when it's convenient for her but doesn't want to be your girlfriend.
try the couch thing, distance yourself a little bit and see if she changes... probably not a good idea to give her everything she wants though, because she might just use you and hurt you...
Most Helpful Guy
Just tell her that you're not interested in being "just friends" or "fuck buddies", thT you want to be in a proper relationship with her. If she says no, just go "well that's a shame, well if you change your mind just give me a ring" and walk away and never look back.
If she regrets it, if she's still attracted to you, she'll contact you in the next 2 weeks to 1 month. When she does you just assume she wants to see you. Just ask her out then and take it from there.