I wouldn't count myself as a social butterfly or as a loner but during the majority of my drinking career I had no close relationships other than my wife and vodka.
As I put some sobriety behind me and found who I was minus alcohol I discovered some interesting truths. I enjoy people and am very close to a few of them. The primary reason I had no relationships is because the people that cared about me screwed up my drinking so I pushed them away. I wasn't a bar drinker so I didn't know any other alcoholics. I sure as heck didn't want to let anyone in because they might discover I was drinking a fifth of vodka a day.
The shame and guilt kept in my private hell devoid of normal friendships and human interaction. It has taken years to learn how to be a friend and have friends and to open up and be vulnerable