i agree with waht was said above and what your friend told you, forget that message about "how i would like to hold your hand" i keep doing what you've been doing, be patience, don't rush things, seems that you're on the good way.
btw, next you go to the see a movie, see if her hand is "asking " to be hold, an "enemie" (a girl) told me that it's usual the girls use that trick

Just be prepared for the day when you see her again in work, and she ask you about the "holding hand" message.

Good luck