Depends...do you mean "fall in love" like you really like this gal and felt like you clicked? Or do you mean "fell in love" like you want to be her boyfriend---obsessed, jealous of what she does, constantly call her, etc.?  If it's the former, no problem, I have lots (most, actually) that I feel that way about.  If it's the latter, then you probably shouldn't see her again unless of course, you're SURE she feels the same way about you.  It can be really tricky.  When I get the feeling that one of my clients is starting to get all mooney-eyed about me I usually break things off.  It is better to hurt them a little by nipping it in the bud than to risk getting into a serious situation with a truly obsessed dude.  Try to take an honest, logical look at the situation and your feelings for her, and her's for you.  If it truly is harmless, great.  If you think there's even a chance that it could be one-sided and unhealthy, then popi---you need to do the right thing.
Good Luck!
Valerie