One of my friends just met a good looking woman in college and ask her out for a date but she refused. He asked again but she again said she had other plans. But he found out later that she had a date with another guy she had just met. So he wonders what he did wrong, and I told him to just forget about it. A lot of girls would find my friend attractive, so I know it wouldn't be hard for him finding another woman. But he has said he doesn't care about anyone else, and wants to continue pursuing this girl. What's the best way for my friend to end this??