It is none of his business! All you have to do is tell him you are going in for treatment. When I went to rehab (in patient) I had the facility fax my job a form stating that I was going to be in for an undisclosed amount of time (It was like 3 weeks, should have been longer, but that is an entirely different story) I fell under FLMA so it was cool. My boss did not ask anyhting when I returned to work.
Agree what your private life consists of is none of his business, but insofar as it affects his business, it is his business. If an employee is going to disappear for an undetermined period, the owner has to hustle to keep the business afloat in the meantime so you even have a job to come back to.
A business owner would be well within his rights to just hire someone else (although I don't know what employment law says about this in the US). He doesn't have any moral obligation to support someone who is having personal problems. If he's a nice guy he may choose to do so, but it's unreasonable for an employee to claim on the one hand that their personal life is none of their boss's business and then say at the same time that their boss has to support them during a time of personal crisis.
Not trying to bash you Mike, but that's how I see it as a business owner. What it really boils down to is if the employee is good enough at his job to offset the cost and headache of giving him support.
And maybe your boss didn't say anything because you're a big mofo.
