Don't creep her out. Your not her boyfriend.

This is the one thing you should never do for a girl that's not your girlfriend. Most of the time you guys don't even realize you're shooting yourselves in the foot with these things, and you're doing them because you want her to like you more, but it usually does the opposite. So let's get into it. Number 1, and this might be controversial, don't hold her hand before she's your girlfriend. This is a very coupley thing to do, and you're going to weird her out if you do it too soon.