I read somewhere that nearly half of them are enmeshed. Yet I can't find any research. I am not sure if that psychologist was making it up or if it's true. I have trouble with enmeshment in my family (not alcohol related) but I wondered if this is true in other families, so I had come across that info on alcoholic families by accident and wondered if it's true.

What does enmeshment mean? Here's one definition I found on a psych website:
"An enmeshed relationship has an extreme amount of emotional closeness and loyalty is demanded. Individuals are very dependent on each other and reactive to one another. There is a general lack of personal separateness and little privacy is permitted. The energy of the individuals is mainly focused inside the marriage or family and there are few outside individual friends or interests."