Given that percentages are low of compatibility between people for the purposes of dating, rejection happens much more often than acceptance in this world. If you're looking for a TV or movie romance, the most you expect in the way of complications is possibly a triangle situation and one major misunderstanding. In reality you know a large number of people who count as romantic prospects, but all our lists don't overlap quite the right ways. For every person who wants to go out with you there are a minimum of nine hundred others who won't. That's just the way the population and attraction factors work out here.
Mokalus of Borg
PS - If this is not borne out by your experience, you were probably very popular in high school.
PPS - Few people place any importance on that later, though.