Love and Sex in Marriage

Sex can keep your marriage strong and lack of sex can destroy your marriage. When there are sexual problems in your marriage, there is quite possible that the two of you will separate within 12 months. Two ways to keep your sex life active is to make time for one another and to talk with each other.
By Sheri & Bob Stritof, About.com Guides

Is intimacy before marriage wrong if you don't have sex?

To answer the question properly, we must first define what it means to be intimate. Since the question mentions marriage and sex, the intimacy is sexual in nature. Any type of sexual union, contact, intimacy is for the marriage only between a husband and wife.

If a man and woman who are not married go to bed together naked and do not have sexual intercourse, this is still sinful. If they fondle each other without having sexual intercourse it is sinful.

If they go to bed together naked and just hold each other, it is sinful. The whole point is that the nakedness, viewing the nakedness, the touching of the private areas, fondling, etc., are all reserved for the marriage bed between a husband and a wife. God clearly instructs that we remain morally pure. by Matt Slick

http://carm.org/intimacy-marriage-wrong-if-you-dont-have-sex