What does it say about a person when almost every new friend they make is a drunk?

I was talking to a friend not too long ago and it came up that every woman he had met in the last year or so turned out to have issues with drinking. My friend is kind of a lonely, melancholy guy who doesn’t get out that much. He sees his kids only on weekends. Like me, he has a brain chemistry problem. It’s interesting, because a couple of the women he met also had the same disorder he has.

These are mostly women he’s met online, so he really knows nothing about them before hand. But it also happened with at least one person he met in real life.

I can relate to the brain disorder thing because it also happens to me, although not to the same degree. But the drinking issue thing makes me wonder.

Do you have any theories as to how to explain it? Is there a certain kind of attitude or feeling about life that is more prevalent among drinkers than it is among the rest of us? Why would he be attracted to drinkers even before he knows they are dealing with the issue?