I'm going to cut ties with my sister that has aspergers
Do you think that's a good idea cutting off your sister in your life?
I can't handle all the aspergers drama and neurosis.
Asperger's is something you are born with and cutting off your own sister because you can't handle her birth issues is a pretty rude thing to do. She can't change her neuroses without support from family, friends and medical staff.  Consider talking to her doctors about how you can treat her better.
I don't care since I'm better than her.
It's not ok to consider yourself superior to other people. She's your sister and it is expected of you to support her.