My dad keeps telling me that the girls I hung out with are not my friends and I need to watch my back and listen to him. How can I prove him wrong?

I've been hanging out with them since October and they seemed nice. They're crazy and very fiesty. They've been telling me I'm too nice and sweet and been bugging me to show my "mean" side.
Like when they are with my friends, they pretend that they don't know me and walk away. They always do that sometimes.
They be friendly with me but with their other friends they pretend to not know me. They would look at me and keep talking to them. That angered me but I pretend that it doesn't bug me. My dad said he's seen the way they've treated me. Even my oldest brother noticed it and told me to listen to dad and he is just protecting me. He also said, "You don't read people. That's your biggest problem. You lack that and that's why you get easily manipulated. Truth is, you're naive." I yelled at my dad, "YOU JUST DON'T LIKE MY FRIENDS!!! THEY'RE MY FRIENDS AND IM GOING TO KEEP HANGING OUT WITH THEM!!!"
He said, "You don't have to yell at me!! I'm telling you. Don't hang out with those girls! They are NOT your friends. Just because someone is smiling at you doesn't mean they're a nice person. Just because you hang with them doesn't mean they're your friends. You BETTER listen to me!"
I don't have to listen to him. He just doesn't want me to hang with them.
Why is my family saying I'm naive and too nice?
The girls ditched me at the homecoming dance to be with their friends and boyfriend's. I was hurt. I ended up sitting alone. No "I'm sorry" no "We feel awful". They just act like nothing happened. I was furious inside but I pretended it didn't bother me.