Honestly if I did that she would take it extremely personal and it would be 2 days before we could talk again. For her its like there will be no pay day for her actions. Its not all bad, as long as I give in shes happy that much I have learned. But I'm not a yes man, again I have no desire to control her, she is free as a bird. But she wants everything her way and basically for me to just agree.
There are some people who want to be right and nothing else matters. I don't want to break the bad news but this is basically a very selfish person. You may find that your needs won't be met and that can be very disappointing. It is necessary to say what you feel, ask for what you want, and to have an opinion be heard without any repercussions. Being agreeable is going to lead to disappointment. The relationship may last longer but it won't be the one you want. It sounds like she only worries about her own thoughts and you can try to talk to her but there is a chance that it won't matter. You have nothing to lose by telling her how you feel.
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I have over 16 years experience in treating adults presenting with a variety of relationship issues