I am happy alone: Sam Smith

London; Singer Sam Smith has admitted he has an "issue" with relationships, insisting he's never had a proper romance with another man until last year.

The "Stay With Me" hitmaker said he does not ever mind being single because he feels "comfortable" alone, reported Contactmusic.

"I was in a relationship for a few months before Christmas, but I really have an issue with relationships. In fact, I have never really had a relationship up to a few months ago. I am just very comfortable and happy alone," he said.

However, the 23-year-old star has also been left "sad and lonely" by feelings of unrequited love.

"I am lucky in that respect but at the same time I have moments where I have fallen in love with people that don't love me back and I have very sad and lonely moments."