It might have happened differently than I'm reading, but to make a breakup final by calling your landlord and his mother to "announce" it instead of looking in your eyes and having a calm honest conversation with YOU--says that he is NOT a catch, alcohol or no...you deserve so much better from a partner.
One thing that helped me was to think about all the ways I had changed my standards when I was with him and how little I expected from him in the end just to hang on. I deserved so much more...
It will get better.
And you deserve much better.