I can sooo totally relate to what you are going through. I think the progersterone mimics the hormonal enviroment you would have with pregnancy and you are experience nurisng aversion. I felt the same way when nursing through pregnancy and now tandem nursing. I can so relate to the feeling of resenting and hating nursing. If you feel that way, I absolutely think it is the right thing for you to wean or least limit nursing. LLL says nursing should continue as long as both mother and baby are happy with it. If you aren't happy, than it isn't working.
I can tell you what I did. Shortly after dd2 was born, I reached a point where I just couldnt' take nursing dd1 anymore. What I did was decide to let her 3 times a day (morning, nap, night, those were the times most important to her) and any other time she asked, I would distract, distract, distract. If she really was upset, I would sling her or walk around with her. Shortly after that she dropped the morning nurisng on her own. Just stopped asking for it. And, we dropped the night nursing when dh started putting her to bed most night. Now, she only nurses once a day during nap. She doesn't always take a nap each day, so what I do is set the timer for 15 mintues and lie in bed and read a good book and nurse her. If she falls asleep great. If the timer goes off before she asleep, we get up.I assume she doesn't need a nap that day. I am fine with nursing her just once a day, but if I wanted to completley wean it wouldn't be hard to drop that nurisng as well.
Personally, I find the advice to drop one nursing a time very confusing. When you nurse on demand, you dont' have set nursings to drop. It was just whenever she asked, it wasn't like we had a schedule. So basically what I did, was put her on a schedule of nursing 3 times a day, and from there gradually dropped the morning and night nursing.