Are Your Friendships Designed to Sink or Swim? - Season 5 / Episode 5

What makes someone a friend in your opinion? Is it based on common interests, upbringing, or careers? Do you only form friendships with people who think the same way that you think? How do you know when your interaction shifts from a loose connection into the friend zone? Are the qualities that you look for in a friend deep enough or do you need to reevaluate and redefine what a real friendship looks, sounds and feels like?