Searching through the friends list of your own contacts on sites like Facebook and Linkedin in the hopes of growing your own friends list for appearances' sake.
Most people have close friends that they consider family, someitmes even closer than actual family members. They call them their other sister, brother, aunt, uncle, cousin or parent.
Your friend marries a member of your family.
You consider your bff a family member.
if you're closer to your best friend than you are to your family members, they are your "friendamily"
Your children call your close friends Aunty and Uncle even though they are not related.
You have people that you think of as your other family members though they are not related. eg. You call your friends parents Mom and Dad.
A friend who you went to school with, then transferred, (their your best friend) you transferred with them, and when they got to the new school with you, they hungs out with you. Then they slowly started to turn away from you. Now they're mean to you. And you're no longer their friend.
When two people are basically dating, but they still call themselves "friends" because they haven't made out. Friendating activities include; going places together, talking to or texting each other daily, getting each other gifts, being there to comfort each other, etc. - basically anything friends would do except there are romantic feelings behind all of it that have yet to be physically expressed. Friendating is done exclusively between two people who dial back on time spent with traditional friends to make more time to be with the person they are friendating.