Okay so here is the deal.
My mom is a total brat sometimes.
I know she is doing what she thinks is best and is trying to make my life better. But she is completely ruining my life, she is making it horrible. And when I try to talk to her about it she just gets mad and says ' I don't want to argue, I know I am right. ' she doesn't even want to hear my side of the conversation. My parents are divorced and I do have the option of moving in with my dad. But I don't want to move in with my dad because I would be going to a different school than I am right now. And I don't want to leave all of my friends and my boyfriend. That would literally kill me inside. My dad is an amazing parent and always knows what to say. But I don't want to move.
Okay now the questions.
Why does my mom act this way?
And
How do I get her to actually talk things out with me and not just assume she is always right?

thanks for any answers.

I know parents can be crazy. Trust me, I fight with mine all the time, but you have to understand that she acts that way because she loves you. If your mom wasn't acting like a brat, then you would have a problem. Don't move out over an argument, that would be silly. Plus it would suck having to leave your school, friends and boyfriend. Just ignore her and do what you want. I know that's bad advise, but that's what I do when I get into it with my mom.
And that part about your dad being amazing, make sure you tell him that. Some people have crappy deadbeat cocaine addict abusive dad's and aren't so lucky.
Speak to your mom in a calm voice, don't give her any attitude and try your best to make peace with her...
Good luck

Thanks but this isn't the first time we have argued and this was one of the smaller ones. Most of the time we argue over her boyfriend. He is really mean and abusive. To me. And she just doesn't see that I guess.

Ah... that is rough.
I know what your going through, my mom has horrible taste in men.
She always marries abusive drug abusers, I'm on dad #4...
Every single one has abused me in some way.
My mom never saw it, never believed me and your mom probably won't either.
When you try to tell her how mean he is she probably just gets mad at you.
I can't help you there...
There is nothing you can do but try to get yourself out of the situation.
Mabey one day she'll see him for what he is.

wow... it Must Be Hard For You... try To Make Her See Your Point Of View... Don't Worry Shell Realize Wat She's Doing... Just Give Her Some Time...

The thing is. My mom does see her boyfriend abuse me. But she thinks he is just "playing around" but he isn't.

I think you might need a neutral person that your mom respects to tell her what's up. My mom does the same thing, or she used to. Everything was a lot better when we went to see a therapist and talked it through. We both compromised and made obligations and we've been working on it since then. Relationships take a lot of work X_X

Wow! You sound just like me when I was 13.
My mom never wanted to listen to me, and she thought she was always right. I wanted to move in with my dad too (my parents are divorced) but you know things would be different if you moved in with him. He'd probably have to put down some rules. Just give your mom time though. Go out with your friends and have a good time, try not to let your mom bother you. When you get older she'll relize your growing up and then she'll listen. Its hard, but it'll get easier :)