Affirmations are definitely important, but I'm not sure if expecting everybody to accept us is realistic. It may help with the fear of rejection at first, but what happens when somebody rejects you? If you don't change the beliefs about that, it will be just as painful as before. No matter how good you try to be, there will always be somebody that will not like you. It would probably be more important to deal with the false belief that rejection is always a terrible thing.