There's nothing quite like social media to awaken the passive aggressive beast in all of us. In fact, if I were a betting gal, I'd wager that each and every person reading this has posted something on their blog, Facebook page or Twitter status that called somebody else out without quite calling them out. It's an ignoble practice, but we're all human and it happens.
More frightening than the thought of someone spinelessly making a remark that we just know is about us and our particular situation is the thought that they're really not thinking about us at all.
Sometimes, people may be talking about you. Most of the time though, they're probably not. They're simply sharing an observation and if it rings particularly true for you, it's probably A) because their comment makes you uncomfortable about your own flaws or habits or B) because you and they share similar experiences in your careers (ex: both of you are entrepreneurs and in the wedding industry).
At any rate, relax. Don't spend all your time analyzing the 140 character remarks other people make. Your time is better spent creating and refining a more brilliant product or service. Once you do that, people actually WILL be talking about you.