If you have a roundpen or a smaller pen (best if its round but doesn't necessarily have to be) try and get her into there. Then push her away and make her work, do lots of direction changes transitions etc until she has one ear turned in to you. She may start licking her lips or put her head down as if she was sniffing but not all horses do. Once you get to this point stop putting pressure and turn your back on her. Let her turn in to you, she may walk across the roundpen to you or it may only be one or two steps but once she comes in wait a few seconds and then slowly walk to her and pat her as a reward. She will soon learn that when she is with you she gets pets and love and when she is not with you she has to work.
If you don't have a roundpen you can use the same sort of concept out in the pasture (hopefully is a fairly small one or you will get a lot of exercise). If she turns to walk away, drive her away and make it your idea. Don't let her stop or try to eat, every time she does make her move again. After a bit when it looks like she is paying attention to you and not just trying to get away then turn your back on her. If she comes up to you then put the halter on and take her out, if she doesn't keep her moving until she does.
Another thing that may help is once you catch her don't always take her out and ride the hide off of her. Sometimes just catch her and give her a snack or a grooming and then let her back out. Then catching isn't always a bad thing.
Well if you made it through that novel congrats! Hope this helps :)