hopeyred.....the crying and professions of love can be a great pulling on your heartstrings...and, his feelings may, indeed be real and he may mean them when he is saying them. The question for you, as I see it, is this------is he capable to the responsibilities of a relationship and to a commitment to another person. I say that the answer to that would be that he isn't.
First of all--he can't even see the consequences of alcoholism behaviors---he doesn't even see it as a "thing"---he is blinded by the denial.
Second of all---he doesn't recognize that he is helpless over the alcohol---which is the very crux of alcoholism. An alcoholic cannot quit after they have the first drink. He probably thinks that he could rely on will power only and that he can do some kind of controlled drinking. He will be blind to the fact that he can't---no matter how many promises he makes to you. His love and your love won't change that.
Go by what you know----not what he says.
Around here, we say to go by actions---not words.