I have to agree that your statement sounds like rules instead of boundaries. Maybe something like...
I cannot and will not be in a relationship with someone who is actively drinking or not in an on-going recovery program of some kind. The choice of whether or not to drink is, of course, entirely yours to make; however, I'm just letting you know what I can and cannot accept for my own life.
Of course, you would choose your own words, but I think it wouldn't sound so much like trying to control him if you mention that his choices are his to make. Just something to think about.