The openly gay actor admits he would not like to settle down with one person as he has a constant fear of missing out.
Asked if he would marry, he said: "No. There`s something missing in me, both gay and straight - I don`t want to be in too close contact with anyone.
"A night in with someone is one thing, but I soon want to get out. I think I was always, from when I was a kid, worried that something else might be happening and I would be missing it - the party or the lover or the job, whatever.
"It`s terribly destructive. And the idea of staying with someone, being part of a couple, always made me feel marooned - as if I was on a desert island away from the group somehow."
The 51-year-old star also claims he has seen his sex drive diminish in recent years - despite having a steady boyfriend.
He told The Sunday Times Magazine: "I used to be so sexually driven, my whole life was about sex, but now that`s completely turned off - it seems like smoke and mirrors to me now.
"But what`s quite scary about losing your sex drive is you do realise that it`s the beginning of something different because it does drive you to do things - go to parties, meet new people. Otherwise you`re just sitting around. I`m like that now: I like sitting around, reading watching telly."