There's this girl at work who im pretty sure is into me, but she has a boyfriend who also works there, but before they hooked up she basically begged me to take her out on a date so know their together but whenever he's not around she flirts with me grabs me by the wrist and pulls me over, and she even drew my face in the computer today, she also interrogated be basically today about my the my size and my sexual experience, but what confused me about that conversation was that she was like but your to young for me to which i responded "yeah your probably right, you're way to old for me" trying to be cocky funny. So my question is why would she do all those things and then say you're way to young? Is she testing me or does she really think that?

It sounds like she's very into you, realized she was flirting heavily with you and then used the "you're too young" crap to either stop herself (ie she's looking for reasons to stop gunning you) or because she realized that you knew that she was flirting and got a little embarrassed, so she tried to throw you off course...