5. They Will Lie For You
A best friend will cover your back at all costs so when her mother rings you for the seventh time in a row demanding to know where she is, you will never tell her that she went out with that boy, got extremely drunk and is now retching in the bathroom. Ever. You will say that she is studying in the library and is coming home soon, but left her phone on charge because she's just really determined to get that essay finished three weeks before the deadline.