All forms of abuse are harmful to a woman's health and self-esteem, so never tolerate disrespect from anyone. You deserve better.
You have to learn when to say, "No... I'm not interested."
Don't try to postpone an answer you know at this moment, as you cannot please everyone or be everyone's friend. Some people should stay away from your life as much as possible. Don't make promises quickly, as it is very difficult to fulfill promises in many cases.
Men respect women who love and respect themselves. Learn to have great respect for yourself; you are not a doll to be used in any way. Set high standards for yourself, and don't make choices that are inconsistent with the life you want or the person you want to be.