Confidence comes with self acceptance. You may not think you are attractive, but I know there is someone out there that does, or will (if they haven't met you yet). Know that you have things to offer. Like what skills you have. What are you good at? You need to get yourself to the point of not caring what others think of you, and I know its hard sometimes, but you need to find a way to be happy with yourself and what you've accomplished and what you've got first.
dont be beta. confidence should be an inner thing not based on external factors. u should build core confidence that external events can't touch it. you get a rejection? totaly cool move on to the next etc.