It means that if ever breaks up with his girlfriend, you'd be on deck to take over. Like you're waiting in the wings for your big moment in the starring role of "this dude's girlfriend," hoping his girlfriend fractures her ankle or something and you get to take over and dance the part of the White Swan. (Sorry, just watched Black Swan. Great movie!)

Except, there are a couple problems here. One, this guy isn't all that sweet and perfect if he's flirting with another girl behind his girlfriend's back. Is he giving you the vibe that he wants to be with you, or are you reading into how he acts around you? If he's being flirty while in a relationship, you have to ask yourself whether this is a guy you want to be with. Because he would probably do the same thing to you.

Secondly, why are you waiting around pining for a guy who has a girlfriend? This kind of question comes up a lot, and I only have one thing to say: LIFE IS SHORT. In my younger days, I spent far too much time pining away for girls who either had boyfriends or weren't interested in me. Sometimes we want what we can't have. And sometimes we want what other people have. I get it. But it's also a huge waste of time.

If he really was meant for you, he'd break up with his girl and then ask you out. Right now, he's either looking to cheat or just enjoys the company of a girl who is clearly into him. Either way, you're going to come out of this with a broken heart. If it looks like he's into his girlfriend, that means he's not leaving her. All he's doing is being a jerk behind her back, while also leading some poor girl on. As a fellow nerd, I hereby strip this douche of his nerd status. Tell him to tear up his nerd card, and to toss out his Dr. Who DVDs and that tattered first-edition copy of Robert Heinlein's Starship Troopers that he found at a flea market. He is no longer invited to join his fellow nerds on Warcraft raids or Wednesday trips to the local comic book store to pick up the latest issue of Ultimate Spider-Man until he stops flirting with you behind his girlfriend's back. Chic Geek has spoken! As for you, there are PLENTY of cute, funny, sexy geeks out there who are also single. Go out and find them, and stop wasting your time on this guy.