Ask her. Don't try to decipher it. Tell her to be upfront and straight. Man, I had enough head games in early relationships to last a fucking life-time (excuse the French). I decided that I had to be straight with the one who is now my husband and demand the same of him. It's the defining characteristic of this (now 14 year) marriage. Screw the head games... set some rules (just my opinion... if you like the games then keep guessing what she means. Chances are she's not sure what she means either and talking it out might force her to get honest with herself and help her iron out her own thoughts and feelings).
Good luck
