Don't let amateur shrinks diagnose, -that is practicing medicine without a license.
Homosexuality was dropped when DSM-II became DSM-III in 1980. Until the DSM-III-R came out in 1987, ego-dystonic homosexuality was a diagnosis.
Three issues are here: Does a behavior impair activities of daily living? and can treatment improve condition/modify behavior? Should insurance pay to treat this condition?
A major change from previous versions was the inclusion of a clinical significance criterion to almost half of all the categories, which required symptoms cause “clinically significant distress or impairment in social, occupational, or other important areas of functioning”. So essentially, if a person is not bothered by his symptoms (and if the legal system is not bothered), it is not diagnose-able.
--oh, and if someone is not a credentialed professional diagnosing you... they are probably a patient or a family member of a patient. Sounds harsh.. but seems to work for a large percentage of the highly critical people I've met.