"Sometimes I think about shooting myself."

It sounds like it isn't just your mom who could use someone to talk with. Is there someone at school, a guidance counselor who could talk with you about the issues you have been having. Sometimes just having someone look at things from another perspective can help you understand why your mom is so stressed.

Tera: Yeah, I talk about this very often with grandma...

Kaoori: Thank you ♥

It's not right that your mom is being like that; verbal abuse can be just as bad as physical, and this is what it sounds like. It can do damage in the long run, and clearly it has already with you having said, "Sometimes I think about shooting myself". You need to talk someone about your situation, and proceed from there.

Unfortunately you can't make your mom do anything, she has to for herself. You could talk to a therapist or something, but it still all boils down to you right now. Help yourself.

And I'm not saying you're the only one with problems - not at all - I'm only saying that you can't force your mom to get help, so all you can do is help yourself at this point and see what happens.

Well I hope you're feeling better soon.

I'm going to be completely sincere here, if you find it offensive ignore it and pass ahead. I tend to see stuff in a somewhat brutal way.

Your mom may have some problems indeed. I had to deal with so many people that sound like your description of her. Since I can't know your level of impartiality on this I'll have to take your words to the letter to say what I think.

The reason of her behaviour is most likely some kind of stupid preconception. Maybe she was treated that way when she was younger, maybe she was the oldest child of the family, or maybe the only girl among many brothers. Maybe you remind her somebody she didn't like. It doesn't matter, the problem remains the same. I remember everytime my father punished for any ridiculous reason, like saying the truth, arguing or not letting him interrupt what I was saying whenever he didn't want to agree I was right, he always said "When you eat from your own purse you will be able to punish your children like you want, meanwhile keep it down and shut up!"
Parents tend to transmit to their children how to treat subordinates, in a way or another. It might not be her fault but she ought to hear the truth one of these days.

On the other hand, she could not be psychologically ready to see you growing. It's unfair to go ahead on this theory without knowing more. It all depends on how she treated you when you were younger.

Suicide is for cowards. Unlike what the general mob says, ending your life is a display of weakness, not of courage. Beyond the point of real depression, you need more strength to stay alive than to kill yourself; it's the difference between living and surviving.
Don't let others lower you to that level. You can do so much more, you can be so much more. Don't keep yourself from doing the best because anyone says you can't. When someone puts down something yours right before you begin improving it, it's always for envy or for misunderstanding, never to say the truth or, the usual argument, "to help you".

Sorry if these are empty words or doesn't fit the situation, but as I said, I'm just stamping around my logic for the good and for the bad (:
I hope the situation gets better for you, or that you get to control it for your self satisfaction, or that you find a way of living with it.
Living, not surviving

Attention, if someone here is a therapist, DON'T READ THE NEXT PART!!
Honestly, I find therapists to be a pathetic waste of money and time, and since time is money and money is time, it keeps getting worse the more times you go. Or at least in my case. The way I think never allowed me to fall, while the induction of the way of thinking of generations of hypocrites most likely will.
Basically what they do is sit you in a chair and tell you things you knew since you were a child. They give you medicines that will most likely harm you someday, they give you white lies that will most likely kill you someday.

Hey, but don't take me too serious, everyone thinks their way of thinking are the only ones fair, right and faux-smart.
I am no exception