Shelina Zahra Janmohamed has written for the Guardian (25 February 2011) on the subjec of marriage. In the article she also mentions the Islamic stance on marriage:
"Marriage has a central place in religion, and Islam is no exception. So, to cover off the religious aspect, here is what Islam says: that marriage is a divine sign in order that the spouses may find peace and contentment in each other, and that love and mercy has been placed between them. In its essence, marriage is for the benefit of the two people involved, creating a tranquil and loving union. But it's more than that too: to get married is to complete "half your faith", it is part of fulfilling the human mandate and achieving spiritual perfection. And only then do we get to procreation as the reason for marriage. Islam is big on clear, solid family structure, and children knowing and respecting who their parents are. And it's also very firm on parents taking clear responsibility for the upbringing and long-term care of their children."
You can read the full article here.