Quote from Chandler in The One with the Girl from Poughkeepsie
Chandler: There are some nice guys at my office. You want me to set you up? Rachel: Yeah. Wait a minute, it's been a long time that I've been single. Why haven't you offered this before? Chandler: I have a girlfriend. I'm happy. So I no longer feel the need to go out of my way to stop others from being happy.