As you probably know, I believe Scripture to teach that engaging in the types of emotional intimacy and companionship involved in close male-female friendships — outside of marriage and for their own sake — is wrong (see else I've ever written for Boundless).But even if you don't accept that premise, such intimacy is still inadvisable in the sense that it delays and discourages marriage, which Scripture unambiguously calls good and right.Let's assume for the sake of argument that your intimate friendship is one of those rare jewels that is devoid of the potential for hurt or confusion. In the past, when both sexual immorality and intimate male-female friendships were much less accepted and less common in society, men and women moved more deliberately toward marriage earlier in life.By offering a taste of the companionship and interactions that make marriage so satisfying, with none of the accompanying commitments or responsibilities entailed in marriage, intimate friendships discourage the pursuit of the grown-up, God-intended outlet for marital desires — marriage.Basically, the question seems to be how exactly single Christians should relate to members of the opposite sex in that large and awkward zone between "we've never met" and a deliberate dating or courting relationship. I won't repeat the full history lesson here, as several Boundless authors have already discussed it (Joshua Rogers most recently, in his excellent piece "Your Friendgirl Deserves Better").Essentially, the historical reality is that until 30 or 40 years ago, long, intimate friendships between men and women in which each served as the other's emotional confidante, relationship adviser and "best buddy" were far less common than they are today.This is especially so in a culture — and a church — that struggles with the widespread sociological trend in its young adults known as "perpetual adolescence." Albert Mohler, Alex and Brett Harris, Candice Watters and other Boundless authors have written about this trend at length.In fact, the failure of many Christian men to pursue marriage well into their 20s and 30s may be one of the most disturbing results of this trend, but that's another topic for another day.
This brings me to my second argument against intimate one-on-one friendships between brothers and sisters in Christ. Men and women who are not called to long-term singleness and celibacy have a strong desire for companionship with a member of the opposite sex. As I've discussed before, Scripture seems to consider marriage (and children) to be a normal part of the progression toward biblical manhood and womanhood (see, among others, Genesis -28; -24; Matthew -41; Luke -36).First Thessalonians 4:1-8 admonishes us not to wrong or "defraud" our brother or sister by implying a marital level of commitment (through sexual involvement) when it does not exist.As I've discussed before, a broad (but sound) implication of this passage is that "defrauding" could include inappropriate emotional — as well as physical — intimacy.Close friendships by their very nature tend to involve extensive time talking and hanging out one-on-one.They tend to involve a deep knowledge of the other person's hopes, desires and personality.