What happened here?
I am not conventionally pretty either. And indeed, most guys don't really pay much attention to me, especially not when I'm with my friends -- who, I have to say, are quite the beauties. However, the few guys that have ever flirted with me or asked me out have happened to be quite interesting, more so than most.
Talk normally, be a little more open than you usually would be -- laugh easily, but don't forget yourself.