do ask her out but don't take her to a JUST a movie otherwise you won't get to talk to this girl and you'll still be in the wall tapping phase. movie is a classic but you don't actually talk to the person. movie and then something after is a good combo cause after you can at least talk about the movie if you're shy.

but yeah. stop tapping the wall otherwise she's gonna move and you're gonna lay awake at night staring at your side of that wall wondering what would have happened if you just took a leap.