Constantly confused

I clearly have no idea whether a man is indeed interested in me on a romantic level or just enjoying my company. Flirting with intent and flirting because it's fun are two different things. How do you tell the difference? One day I will be able to do so; I have no idea when that day will be. I'm oblivious when it comes to realizing that a guy is actually interested in me beyond being "just friends," and I have a great talent for being attracted to unavailable men. It would be great if the stars could align and help me in this predicament.

Side note: I was recently given love and life advice. I was talking with my seat-neighbor at the Sting show about blocked views and staying up late, and we came across the topic of my new employment with an airline. She worked in the travel industry and gave me a pseudo-prediction of what the future holds for me: I'll travel the world, have tons of adventures, and along the way I'll find someone fabulous. I wonder when that day will be, but until then, I suppose I should get started on traveling.