This is Abby (white shirt) and Ellie (purple shirt). They're best friends and have been since they were 4 years old. They've been there for each other through everything, and are constantly asked if they're sisters.
Abby and Ellie go to the movies together and have a great time, they are the true friends because they make an effort to see each other.
Here, there is a boy and a girl, they aren't associating with each other so they might know each other and be friends but might not be close. This is an example of casual friends.
This square demonstrates a friendship where the two people can tell each other everything. You can see Abby talking to Ellie about something and she looks shocked. But still, she's there to listen.
Here, Abby and Ellie are at the mall having a good time, in the background however, there are two other girls that they go to school with, Kaitlyn and Anna, are in the back, clearly laughing and talking about them.
The moral of the story is that there will be people that you don't like, but if you continue to ignore them and stay with your true friends that won't talk about you you'll be happy.