Thanks for all of the comments here. I have chickened out of bringing up the subject, which I think, as Missy says, is all down to not knowing her well enough to be comfortable bringing it up. If she were a closer friend, then we probably would've already discussed it somewhere along the line!
Anyway, I've gotten some great suggestions here so far, and the Cetaphil (plus avoiding eye makeup for now) does seem to be helping quite a bit, and I can always try using a dab of Vaseline at night or something, if nothing else.
