I'm tough and successful. I don't "look" like someone who was abused. I mean, I'm 24 and I speak five languages, have a degree in mathematics, published a book last year (to be cited in an upcoming textbook), and started a company this year. Would you expect that I was raped? Abused by two boyfriends? Had a mentally ill mother and a father who's completely given up on me?
In early elementary school I was walking 10-mile hikes, barefoot, over volcanic rock, without complaining (since the results of complaint were worse than just doing it). No point in causing trouble, right?
Well, there goes the last bit of sympathy I've had for your mom.
And it looks like you don't really need her, so there's absolutely no reason for you to stay with her. So my first proposal stands, get the hell away from your mom and move on with your life. She is a parasite, who tortures you because she feeds on you, on all the errands you run and the outlet you provide for all her negative emotions, and she will never let you go because of that, until you go mad as well and share with her her twisted world. She always was a parasite, you say, and never chanted one iota no matter what you did? Then she doesn't deserve your compassion. No more than any tick or tapeworm or other blighted creature that feeds incessantly on the juices of others does. You shouldn't hate her, for she is mentally unsound and never really had a choice, but you should treat her for what she is, and cast off the chains of slavery with which she has been binding you so thoroughly, and move on, leaving her behind.
Screw your mother. You are stronger, and better, and infinitely more beautiful inside than living with her made you think. You deserve better.
And just out of interest, what's the name of the book and the company?