I think that really depends. Diagnosis is subjective, at best. The deal is that your life--job, school, family, whatever--should be kept running smoothly If things get out of hand and there have been incidents or close calls, you might want to consider some kind of treatment.

Speaking as a "patient," I'd be very careful about getting into treatment and very selective about what, if any, psych drugs you choose to take. Having said that, its always better to do things on an outpatient basis than deal with everything that goes with hospitalization.