To dream that you are rejecting something, indicates that there are feelings or situations that you want to be rid of. Alternatively, you may be refusing to accept a situation that is being imposed and forced upon you.
To dream that you are being rejected, signifies a lack of self-worth and alienation of others. If you are being rejected by a lover, then it suggests that you are you are rejecting some part of your own characteristic.
Dreaming that you have been rejected could mean:
You are feeling rejected, let down, or left out in real life—in a current or past situation
You are rejecting or judging yourself in some way (try releasing judgments of yourself and accepting yourself just as you are)