Hey, girls are people too, you know. I don't think there's anything special in talking to girls. Okay, I really can't say that as I'm a girl myself. BUT I find it just normal that guys come to talk to me as most of my friends are male. How to act with ladies then? Well, be polite and don't do anything stupid but don't change your personality on purpose as they will probably notice and start thinking what the heck is wrong with your real self if you have to act un-naturally. So be yourself and do it without thinking it as a big deal. If it doesn't work, remember there are other girls and most of people don't even notice if a person talking to them does something slightly silly. And online talking is even easier.
The dreams are just another reality.