What happens when you start liking your best friend?

Unless the feeling works both ways, you usually end up disappointed and risk losing a good friend. Never invest a lot of emotion in someone unless you are sure they feel the same about you.

So the next question becomes how do you know how your friend feels, right? A good rule is, if you don't know, she most likely doesn't feel the same way. It works like two magnets. When the attraction is there, they snap together. When it's not there's nothing either can do to make it work.