My mom is also abusive to me because of my autistic traits and some other things. I want you to know that you are so, so important, you are not responsible for her treatment of you, you are wonderful just the way you are and you don't owe anyone anything. Eye contact is so overrated and it's not fair of her to take that to mean it's ok to abuse you. You are loved and you are valid, take care of yourself because you're worth it. <3