are insecure. The main reason they don't get asked out is that guys are intimidated by their looks and assume they stand no chance with them. One girl I know is 6'0 and guys just don't have the confidence to stand next to her. There are so many reasons why people have crappy social lives. Don't sweat it. Opportunities will come. It doesn't have to be at BYU or in college.
By the way, girls suck too. They judge boys just the same in different ways. But nature finds a way eventually.