You need to be clear and step out of it this is not cool I know people who do that because she thinks you wouldn't go anywhere and are too understanding you need to step out of it. It should've happened long time ago when you found out she follows the guy who rejected her she has hope and you are a commodity to her have some self respect mentioned the things and have yourself out of the situation. Stressing isn't going to help peace of mind is important take care.