Having a relationship and having sex both nourish you, albeit in different spheres.
I think the problem with dating is that it is an activity we do expecting a result: a full-fledged relationship.
Whereas if we go only for sex, our expectations aren't that deep. We expect at least a decent fuck.
Maybe you give much weight to dating and getting into a relationship? Enjoy your single life, learn to value yourself as a lone individual and treat any possible relationship (and the dating needed to get there) as just some a nice extra that can come or won't into your life.
(Seriously, is this shit because of the recent legalization of gay marriages/civil unions? I swear that the moment we start deeming single gay people the way heteronormative people deem single persons -as spinsters and losers- I'm gonna go out and kick some asses)