Have I blown it? Please help!?

Neither, you shouldn't feel horrible or totally forget the man who made your knees turn to jello. Most girls are sensible up until they meet someone who..I guess makes them feel like a teenage girl with a high school crush, so of course we're going to do these irrational things that include calling and leaving messags obsessively. And then a second later, we feel guilty, so we call again and say something like "I'm sorry, blah blah blah." It's all girls, and you didn't screw up. When you really meet someone who makes you go crazy over them, (even if they just smile in your direction) you're love struck. Give him time to think about you. Mean while, I suppose you could try to hold off from calling or messaging him until he makes the first move. All I can tell you is hang out with some of your girl friends and have fun with them. You don't want to waste a portion of your life wondering "What might have been". You have to handle the problems as they appear. But make sure, your life and your happiness is first. Go to the beach with some girlfriends and check some guys out or adopt a kitty or a dog from a shelter. It's important not to shut down and dwell, because you might end up cutting yourself off from friends and family. I hope I helped. Good luck, and don't feel like you're the only girl in the world with this problem. It's apart of life. PS. you have not ruined anything.