It is impossible to please everybody and sometimes we agree on things that we don’t like just to please others or make them happy. However that behavior is harming us. If you don’t like something or don’t agree with something, say no! It is okay to be selfish because you are the most important person in your life. The person you should first care for is yourself, only then you have all the strength to care for other people. If you exhaust yourself you are not helping anybody.