We're extroverts.. and I never forget that I cater to people's needs moreso than my own. I would never flirt with the intent on getting into someone's pants, to seriously compliment them, etc. I'm not good at all with making the first moves on anything relationship-oriented. So if someone thinks I'm flirting with them, they're obviously mistaken.
People hear what they want to hear though.. It's not been the first time that I've paid attention to a guy, and they've seen and analyzed my actions as more than what they are, and the saying goes "people hear what they want to hear" and before you know it, I'm apologizing and doing damage control.
I can't change who I am for every lonely person. But I do ensure my SO's never feel out of place or uncomfortable.. and I think I'm balanced enough that aside these occasional things, I don't hurt people with my actions and words.