I've never really liked taste of alcohol containing drinks bar some light beer or few drops of some vine. Hence I've never drank alone. I would drink and get moderately (sometimes more) drunk at parties that were / are happening quite often. In the beginning being drunk with pals and gals brought me into elevated set of mind and I liked it. Also it was easy way to sex when very young. Pass some years that type of high had worn off and it has became utterly boring. So I just stopped. Sure I would take a symbolic drink under some circumstances (2-3 times a year) but that's about it.

So no, I do not have any underlying mental / health issues. Just do not give a fuck about drinking. It did not impede my social life either. I still meet with friends just as before.