In the past, I have felt that way, but not so much any more. It does sometimes creep up on me but I tend to deal with it with logic. Thinking like you have been, I am not responsible for the way others treat me. There are other ways to deal with the situation, there are things you can do to stop people treating you like this but it's nothing to do you giving in to their wants, it's more to do with managing their expectations, I.e. letting them know that the way they are treating you is unacceptable. Once you take control and establish what is and isn't acceptable alot of the mistreatment tends to just go away.