MY MOM BEATS ME…………….?

Lets i am 14 and have been beat for my whole life…
I get beat with Sticks medal Pinches and punches me thing thrown at me.
SPITS in my face and hoarks in my face.
She yell at me in public.Scratches up my skin and leaves me scared and bleeding.
I cant hangout with any of my friends.
And when i was younger i had a bladder problem i use to wet the bed till i was 12.
She thought i was doing it on purpose so she would come and pinch me really hard on the sensitive side of my thighs till there would be scars and scratches bruising and red marks so she could make me stop.
She scratched my face pulls my hair hits my head against walls.
she says I'm sick and needs help.
she calls me
-*****
-stupid
-she hates all of my and her friends
-she is paranoid
-slut
-whore
-****** idiot
-prostitute
-she called me stupid and says i have no life
-i should be dead
- cant get a job
IS IT ABUSE!
I would love to go to lunch party's with my friends.
or cute little slumber parties but she never lets me do nothing.
What should i say so she would let me go.

Around Christmas she got my little sister a laptop my tow older sisters uggs and more
and i got nail 1 nail polish
Because i babysit and bought myself a canon camera and she said wait for Christmas rap it up then open it then i did.So that's all i got.
don't care about the gift it just that she never cares for me :`(
Please help
Is it abuse
What should i do
and I'm not gonna tell anyone (teaches and stuff) because i don't want to go to foster care…