To be rejected by someone doesn't mean you should also reject yourself or that you should think of yourself as a lesser person. It doesn't mean that nobody will ever love you anymore. Remember that only ONE person has rejected you at the moment, and it only hurt so much because to you, that person's opinion symbolized the opinion of the whole world, of God.
Yes, I understand why things had to happen this way. I understand his reason for causing me pain. But mere understanding does not chase away the hurt. It does not call upon the sun when dark clouds have loomed over me. Let the rain come then if it must come! And let it wash away the dust that hurt my eyes!
Isn't it funny how the memories you cherish before a breakup can become your worst enemies afterwards? The thoughts you loved to think about, the memories you wanted to hold up to the light and view from every angle--it suddenly seems a lot safer to lock them in a box, far from the light of day and throw away the key. It's not an act of bitterness. It's an act if self-preservation. It's not always a bad idea to stay behind the window and look out at life instead, is it?