from what you describe you have multiple issues to overcome. she seems to not think about your feelings in any situation and you continue to give and give because of your love for her and then you feel resentful. soon those feelings of resentment are going to overwhelm you. it sounds like you attempt to talk to her but she isn't interested in hearing it. I am sure this is due to her age. it is just like listening to a parent talking to her telling her she is doing wrong. you are right that she does not appear to know what a healthy relationship is. how much can you keep giving without getting in return?