Your heart is important...
How over is the relationship? Could it be possible that you are imagining the hand squeeze?
How would you feel about talking to her and asking her to stop with the flirting, and teasing and other bits of affection, until you get a handle on your feelings. A good woman would understand that.
Like I say, it's a tough situation... But you will get thru it...
How about aversion therapy? What are her bad qualities, look in the annoying girls topic, see how many apply to her -- remember that --