Rejection fears can begin as early as childhood. Children raised by parents who are less expressive of their love and are more critical than understanding of their young ones' behavior can already plant the seed of rejection fears into the child's psyche.
I know of parents who constantly criticize their kids' grades in school even though their children are already among the top achievers in class. For these parents, their children are just never going to be good enough until they are number one. But they are not aware that the message they are sending out to their children is that they will only be loved and appreciated if they're top of the class and win the gold. Children who are in this situation constantly feel pressured to push themselves to the limit or risk the possibility of being rejected by their own parents. They eventually grow up to be adults who always have issues associated with rejection fears.
Rejection fears may also surface later in life for some people. Usually a bad break-up with a boyfriend or a girlfriend can make a person begin to question his or her own worth. They start to wonder what it is about them that is not good enough for the other person to leave them. My experience with unhealthy relationships is one of the major reasons why I had to deal with rejection fears. Being told that if I do this or do that then I will be loved in return, even if they were things I did not want to do. But I did them anyway because I was afraid to lose the other person's love; even though in truth, that was not love but manipulation.
Rejection fears can make you compromise your own principles, make you lose who you are and make you feel less about yourself if you allow it to take over your life. You must always remember that you are enough, all on your own, and you do not need another person to tell you how important you are, how beautiful you are or how much you are loved. You must already know this deep in your heart so that you are not dependent on another person's opinion to feel complete. If you love yourself and accept who you are, with all your imperfections, then you will find that you are no longer hounded by rejection fears.