Obsessive Compulsive Personality Disorder (OCPD)

I'm turning 24 this year, and my sister is turning 33. I always thought that the reason my sister acted as she did was because she had OCD and the age gap between us is significant. I also thought that was the reason that even though I'm a fully grown adult, I still never get any respect from her. If you google symptoms for OCPD, it's my sister to a T. I can recall when she got married, she made me her maid of honor, since I'm her only sibling, it seemed fitting. I was only just turning 18, so I couldn't make the big financial plans that the maid of honor generally coordinates. She refused to let me do even the smallest of things like helping make wedding invitations. I wasn't "good enough" to help her. Or I would "do it wrong". When my boyfriend and I go home to visit my parents, she naturally comes over to visit since we don't see each other often. But she sucks the energy out of the room. No one else can talk, and if we do she just talks over us or interrupts us. If she doesn't agree, then we are wrong. She goes to GREAT LENGTHS, (meaning she rants about how we are wrong and she is right) basically until we give in. She thinks that she doesn't have a problem, but that everyone else does. She is absolutely obsessed with rules and planning and making lists and having EVERYTHING be perfect.....she is a mother of 2 young children, and I realize that having a toddler and a baby is very hard. I DO have sympathy for her....but at the same time I think she makes things worse for herself than she has to. My parents love her to heaven and back, but she is very patronizing even to them. And to her husband. He basically takes orders from her like she's an army general..the recent media upheaval about the college boy that raped a girl and lost his chance at the olympics is causing friction between myself and her. I was raped in high school...and the subject is sensitive. But she insists on telling me that what he did wasn't wrong.....which is fine I guess because that is Her opinion. What I don't like is that my opinion is wrong because it doesn't mirror hers. She even went so far as to explain to me in great detail the definition of Rape on facebook. As if I don't already know what that entails. I don't know what to do anymore....I love her so much. She is my only sibling. But, she has no respect for anything I say, and I can't chalk it up to the age gap anymore because I'm an adult now. I think has has severe OCPD, and she thinks she doesn't have a problem. I finally called her out on it this evening, and she said I'm the one that is crazy...

If you listened to my rant, I am ever so thankful. If you have any advice, PLEASE share with me. I don't know how to enjoy my only sibling anymore. I love her, but I can't do this anymore.