Frankly we gotta change this mentality of discouraging Christians from dating.
I would say we don't so much try to discourage Christians from dating as discourage the worship of relationships, including the mentality that any relationship is better than being single and the idea of searching for a romance for its own sake rather than because you genuinely like the person you are with. Siberian made a great point about how much values have changed, and to here some people's stories around here about dating even among Christians, I often think it's the character and expectations of the potential dates that discourages me from dating far more than some Christian teaching. If most of our available options are people who don't meet our values, should we just assume we must compromise our values in order to be loved and accepted for (not) who we really are?