Imagine this scenario: "You grew up in a home were there was no unity between you & your siblings which led to intense Sibling rivalry. Along the way, you meet a friend who becomes so close to you that people often mistake you both for blood siblings" Here is the question, would you include this friend in your will?

Don't you think people in your family will get offended if you include that you friend??@naijaboy

Anybody can be included in your will. As a matter of fact you can even will all to your dog and appoint executors to act upon it after your demise.