Why do some people say I hacked my facebook to get 1,000 friends? Read more?

I have 1,338 friends on facebook, and when I tell some people, they say: Because you hacked it. And I was like how can you hack yourself to get 1,000 friends?! Also some people think, I know everyone has a facebook, because I've been stalking them, but some of my friends have more than me, like 2,000 or more! Please help, this is very annoying!