Originally Posted by Carlotta

I know it sounds a bit callous but since you have only 6 months invested and have no assets in common I would suggest you cut your losses now and don't even wait for the other shoe to drop.
It will get far worst before it (if it ever) gets better. Him calling you 4 times at work is only a precursor of things to come. While the relationship was new, he was probably on his best behavior and trying to hide his alcoholism but now that he knows you know and were supportive the first time, he probably will keep pushing the envelope.
Do yourself a favor and spare yourself years of misery. It can be very easy to fall into let's give him (yet) another last chance trap.