I agree wtih Serafina. Its just a part of life. Everyone gets rejected at some point, (although I am sure some get rejected a lot more often than others). I admittedly still feel quite hurt and harbour some resentment towards people if I feel they are judging me purely based on the way I look, or a first impression, but I am afraid there is just nothing you can do about it.
Its simply part of the human condition, I think people are naturally distrusting and afraid of each other, and it takes a LOT for someone to identify and be forthcoming to someone that they dont already know. I have noticed that if people can identify with you in someway based on their first impression of you, then you have a greater chance of having friendship extended toward you...
Social class, wealth, and apperance are all factors that we judge each other on, and its our gut feelings that determine how we feel about someone, whether or not we realize it or not...
As for being ignored...its just far easier to deal with life if we all turn a blind eye to the needs of others....
either that or I am just full of crap and have no idea how the world works.....