There is nothing wrong with being single.
It is good
I Cor. 7:1,8,26 -- Now concerning the things whereof ye wrote unto me: It is good for a man not to touch a woman... I say therefore to the unmarried and widows, It is good for them if they abide even as I... I suppose therefore that this is good for the present distress, I say, that it is good for a man so to be.
It is a gift
I Cor. 7:7 -- For I would that all men were even as I myself. But every man hath his proper gift of God, one after this manner, and another after that.
It is useful
I Cor. 7:32,33 -- But I would have you without carefulness. He that is unmarried careth for the things that belong to the Lord, how he may please the Lord: But he that is married careth for the things that are of the world, how he may please his wife.