What if I don't care about anyone but my parents?
Why do you care so much about your parents?
Because my life is really simple, and it really just involves me and my mom
I can understand why you value your parents more than most other people, but it is wrong to only care about your parents.  Even your mom will want you to get out into the world and make new friends and try new things.  You'll both be much happier if you are more inclusive.
Please, my mom doesn't want me to leave the house
It is hard to meet people if you don't leave the house but even if your mom doesn't want you to, you should go out. It is good to care about your parents but you are missing out by not caring about other people and not letting other people care about you.