Looks do help create opportunities, but studies have shown that by and large, attractive women are more likely to marry a less attractive man than an attractive man will marry a less attractive woman. As the study above indicates:
"The [less attractive] husbands seemed to be basically more committed, more invested in pleasing their wives when they felt that they were getting a pretty good deal. Because for men, the attractiveness of their wives is part of the deal. For women, thats not part of the deal. The deal that women get isnt being with an attractive man. Its being with a protective man, or a wealthy man, or an ambitious man, or even a sensitive man. So they didnt care as much about the appearance of their husbands."
If you aren't having any luck in the dating scene, focus on improving yourself as a person and creating more opportunities for success. Success is a numbers game--your chances go up the more times you try. If you aren't trying, of course you're never going to succeed. The only difference between you and those who've succeeded is that those who succeeded didn't give up when they failed.