I too am shorter -- and dating is tough. I've heard a lot of girls say, "oh, well... I won't date a short guy, but I'm sure some girl out there will!" thanks, a lot :P
It's one of those things where it's a reason the hobby enters the mind -- it's a place to get away from that. It's always tough to hear you're placed out of being even in consideration to date someone, before they even know what you're really like.
But, I understand it, too. I'm attracted to specific things in women -- for instance, I prefer to date the spinner. So it's a two-way street, I suppose. Everyone has their preference, and we all prefer honesty!
So, it's tough to hear... but it's reality. And I don't have a complex over it, I bounce back quick from rejection and try again. My one request is that when with a provider, steer away from the "oh you're so little and cute, I could put you in my pocket!" (yes, I've heard that before) Nothing like some good old fashioned emasculation to get you in the mood