Well then it doesn't sound much like an addiction, so you're probably good in that respect. I'm sorry you don't feel happy anywhere else.

As for the physical stuff, sorry, I don't really know. You'd be better asking a health professional about that. Although maybe someone else on this forum is more knowledgeable.

I do sympathize. I'm AvPD with it's attendant social anxiety. My exercise classes are one of my few "safe" places. I can be with people and talk a little. People tend not to ask deeply personal questions when they have sweat dripping off their nose.