I'm 4'11 and 92lbs.  I understand exactly what you mean. People don't respect you as much, and treat you differently.  I used to be the head manager at a place and when people would want to speak the to "The Manger" I would get laughed at sometimes, and I've been told to go get the actual manager.  In groups people ignore you, especially a group of men. Doesn't matter if you're the hottest thing there, you just get talked over. Buuuuut maybe that's just being a woman in general.