Facebook is creepy no matter what. But it's up to you to lessen said creepiness when web-stalking girls you like. The good news is women feel much more secure over the internet. You initially won't seem as creepy as, say, getting caught hiding in her bushes with a set of high powered army issued binoculars, but if you keep popping up sending her virtual roses, Facebook invites, and weird messages to her inbox, your, um, lady friend will definitely begin to feel creeped out. Read this loose set of guidelines before you decide to flirt with girls on Facebook, for preventative measures.
Don't be overbearing. Your first step is to realize that Facebook isn't the real world. If you're chatting with a chick on Facebook, don't get all upset when she doesn't respond to your questions right away. She could be using dial-up. She could be having multiple conversations. Or hey, she could actually have other windows open to use the web for something more than looking at porn and chatting people up. Whatever the reason, don't send her a string of messages. Give her time to answer the first 37 messages before sending her anymore.
emoticons and symbols are for? No they're not for little kids. flirting. Use them. They can convey messages without you having to spend an hour typing out a message. A smiley face can say a thousand and one words. Now a smiley face with a wink, is saying a million and one flirty words. Think about it.