Where Are All The Committed Gay Men?

For years now, my gay friend has been complaining about how he can never seem to find a long-term partner on the various gay dating sites he peruses. Every time he meets someone he's interested, it turns out to be a one-night stand at worst or a three-month tryst at best. Oddly, this isn't the first guy who has bemoaned that it's difficult for gay men to find a meaningful relationship. As much as I would like to help, I'm pretty out of touch with the gay community, so I can only work with broad generalizations and stories from my gay friends.