There are twice as many men living alone between the ages of 25-44 than women.
Esther Stone investigates who they are and why they are still single.
Neil is 34, and lives in rented accommodation.
His relationships tend to last about eighteen months and then he says, 'I get to a point and I don't know what's supposed to happen next.' Ex-girlfriends have called him a commitment-phobe, but he says 'I'm not ready for a long-term relationship yet.'
Farrell is in his mid-forties and had four children from previous relationships.
He is looking hard for his soul-mate, but he doesn't necessarily want to live with her.
'I'd like someone to meet up with, have great sex with, have fun and then we go back and get on with own own lives.'
Whereas Phoenix, 43, works so hard he hasn't got time for a relationship.
'Maybe in two years time I can slow down and give some time to it but not now.'.