Friendly or Flirting?

If you ask me, there is a fine line between someone being nice or flirting with you. I got into this with my friend when we went to the mall and there was a guy in Spencer's who approached us and was talking to us the entire time. During this, it never occurred to me he was hitting on me since he had been talking to us both, then when we left, she had pointed out that he was flirting with me. I told her that he was probably being nice or pitching sales for us. That is part of their job. I'm clueless anyways about someone actually flirting with me. I don't pick up on hints especially if their subtle. Sometimes when I'm complimented, I just take it as that and nothing more. I mean I feel flirting is more straightforward, even if someone is too shy to come right out and flirt with another person. So what do you guys think, are you oblivious as I am when this happens? What are some signs to look out for when someone is flirting with you? How do you flirt with someone?

I'm totally oblivious unless they actually ate petty blunt about it. I mean I can pick up on a few cues, but most of the time I'm pretty naive.

Every girl who has ever talked to me could have been hitting on me and I'd have no clue Suddenly a lot of things make more sense in retrospect

I'm probably worse than you. I remember a time where I thought I was just friends with a girl right up until I got in bed with her.

You are cute as a button so I wouldn't be too shocked. There had to be something though...that your friend picked up that singled you out. Maybe even as simple as when he asked you both a question he was staring at you when the question finished.

I let whole friendships and too many relationships pass by because of my obliviousness. Id have 10 dollars for every 50 cents a girl was hitting on me. I'll spare you the boorish details, but I was actually asked to prom and another time to be someones valentine. I'm so stupid! I try to be this perfect gentleman as to not mistake someone's compliment as them flirting or a simple convo as them trying to hook up with me. I realized now that I friend zoned so many girls in my life so far, all because I thought I was too fat and therefor unattractive to have anyone like me enough to go out with me. 21 and still have trouble making friends but I'm trying to change that now. By the sweat of my brow and the ache of my back I will become a more social being.