What makes a good friend?

What kind of qualities do you look for in a friend? How do you know when someone is a good friend or not? 

Here are some qualities you should look for (of course, everyone has their own qualities they look for): 

Someone you respect and whom will respect you in return

Trustworthy

Someone who sticks by your side in good times and bad times. (when the going gets tough, the tough shouldn't get going) 

Selfless, not selfish

Non-judgemental 

Has other friends and appreciates that you have other friends as well

Supportive of you and your goals 

Honest

Good listener

Thoughtful 

Any others I may have forgotten??? Fill me in.