Facebook makes meeting new people extremely easy due to the fact that it allows you to add up to thousands of friends, and acts as a social melting pot of the internet. If you comment on a friends status, and one of their friends comments on it, maybe you two will strike up your own conversation. This can lead to a great friendship down the road. Most people find it a lot easier to start a conversation with someone over Facebook than in real life, so a lot of high-school relationships tend to start there. It's as simple as a "You should text me some time.