It definitely sucks when nobody cares about you.
It sounds like things might be better for you if you could manage to figure out a way to live someplace else, put a little distance between you and your mother.
Killing yourself is something you can always do later. if you're that unhappy with the status quo, it might be an idea to go off in a totally new direction first, see what happens and what you can put together.
I got a dog who loves me. She's still alive, but I understand about the cat. If she's waiting for you on the other side, I don't think she'd mind waiting a while longer.
_________________
They murdered boys in Mississippi. They shot Medgar in the back.
Did you say that wasn't proper? Did you march out on the track?
You were quiet, just like mice. And now you say that we're not nice.
Well thank you buddy for your advice...
-Malvina