Quote:
just remember that she has to want to be your boyfriend first.
Fail. Thought it was funny.
Basically what some of the guys here said: You gotta make baby steps and test her comfort levels. I do NOT advise you to make giant-alphamale moves on her, since it risks making her uncomfortable around you and thus, you risk losing an actual friend.
So slowly escalate (not too slow) and test her comfort levels. Start off with the playful kino, then some flirting combined with it, then some more intense kino etc etc. Whatever fits the situation (I know nothing of how it's between the chick and you).
If she negatively responds to anything you do - slightly freezeout and IOD, then do it again (this can be in a course of a few days, not just that moment). This will give her the image that you're actually a person that regularly flirts/touches, so she better get used to it.
.... And of course, if this goes too far and you risk losing her - just stop it. Don't push it anymore and move on.