You have to understand that it's a ridiculous notion. There are BILLIONS of women on this planet. You can most likely find someone better than the last.
All women have different aspects of personality which make them an attractive person as well. For instance, one girl you date may be very well rounded and knowledgable in the area of literature and could be a teacher, whereas another girl you meet might be very passionate about animal rights and volunteer regularly at a local animal shelter.
A while ago I was seeing a girl who worked with handicapped children and helping their parents take care of the children, then that ended. Soon after, I dated another girl who was into great music who was a special education teacher. Both were very attractive personally in their own areas. And I was really bummed out when things ended with both of these girls, but it helped me realize "Wow, there's probably a lot of genuine caring women out there I would love to meet!" There's nothing wrong or "non-DJ" about being bummed out over it. All humans get sad when we lose a connection with someone we adore, platonically or sexually.
A "non-DJ" thing to do is to try and control that which cannot be controlled (ex: beg for a woman back when she has no desire to be with you) or sacrifice elements of your personality for appeasement of others. Only change your personality for YOURSELF. no one else.
You just have to role with the punches and keep moving! Recognize that your sad over an event, but that it will eventually pass and you will return to your normal self.
Get what I'm saying? Hope you get past this soon man! Take a break from women and focus on yourself for a while like PDX1138 said.