Rejection seems like the worst thing in the world, but it really is a part of growing up. Often times it has nothing to do with you, so don’t let your self-esteem be bruised by it. The other person might just not want to get into an exclusive relationship at the moment.
The less personally you take these setbacks, the more you can benefit from the experience. It is the firm and lasting friendships that are more important at this point in time – the more people you know, the greater your circle of choice for a special someone when the time comes!