Please be a good friend...

This year, I had 2 friends, let's call them Destiny and Celia.
Both were just like my sisters, except for one thing: They HATED each other.
That didn't stop me from being friends with both.
Eventually, my friendship with Celia went down hill. She started to call me things like "Idiot, "Stupid", and "Re.tard", thinking it was funny. She would critisize everything I did/had: my clothes, my hair, my drawings, my books, my other friend. She would boss me around and I went along with it, just for the sake of our friendship. I got so frustrated: she treated me like a dog.She wouldn't even listen to some things I would say, just walk away and claim "She didn't want to hear about it". After a while, I stopped talking to her. It had been a month since I had talked to her, when I asked her a simple question in wood shop class- "How much were the pegs again?" I had to ask her because she was the only one not working in the back (Not sawing, sanding, etc.). She replied-" Why are you talking to me?"...I replied "I just want to know how much the pegs are. You are the only one here.". She replied "Whatever. Go ask someone else.". That hurt me more than you would think. She hated me so much that she couldn't answer my question.
What she did to me really affected me. So, just a little reminder: Please be a good friend and avoid people who seem like bad friends.