A.,
I'm going to be very direct here and hope you will take this in the way intended---with concern and kindness. It is the same tone I would use with a dear friend in the same situation, the same tone I'd hope someone would take with me if I were in this situation.
You say that honesty is the number one thing for you in a relationship. Yet, you've let him violate this fundamental priority of yours repeatedly. Why?
True love doesn't hurt like this. True love is based on mutual respect and shared values.
You two don't share fundamental values like honesty and trust. He does not respect your feelings and concerns, but that's because his primary relationship is with alcohol, not with you. In a situation like this, there can be no healthy, loving relationship. He's on one path, and you're on another, and the two just don't meet anywhere. You have to be on a common ground to set a strong foundation for a healthy relationship.
You are disrespecting yourself by tolerating this behavior and setting yourself up for a lifetime of misery if you stay.
Best advice I can give you? Never ignore your gut. That pain in your stomach is telling you what you refuse to see. That pain in your stomach needs to be interpreted: It's telling your mind to wake up and see this situation for what it really is, and it's telling your heart to put itself on hold because decisions need to be made based on reality, not some dream of what you hope this relationship might be.
Go to an Al-Anon meeting. Seriously, just do it. It will help you to see that his drinking is not something you can control, no matter how much you check on him or who you check with, how much you plead, how many false promises you extract from him.
His unwillingness to work on his addition has nothing to do with you or your worth as a partner. There's no amount of love, patience, no level of desire that can change him. His addiction is about him, and if he's not at the point where he sees the problem or is willing to address it, then the addiction will continue, most likely getting worse over time, leaving lots of damage along the way to anyone in his path.
Please don't dismiss my words because of the use of the word addiction. I have the feeling that you believe he doesn't have a serious problem because he has cut down from 6-10 drinks a night to 'just 1' and that his last episode was a few months ago. People who have problems with alcohol can give the appearance of being "in control," by seeming to cut down, but the problem isn't limited to just the drinking itself. It's about the underlying thinking.
Periods of seeming to cut down or longer stretches between episodes are usually just the calm before the next storm. There's a problem here, and deep in your gut, you know it.
If you have children, they are watching you and learning very unhealthy patterns. They deserve better, and it's up to you to make that happen. If you do not have children with this man, please do not bring any innocent lives into this mess. It will only make things worse, and no child deserves a start in life with turmoil between parents.
Save yourself now, before you become entangled any further. You'll never find the great life meant for you if you stay stuck in this disaster. And life is way, way too short for that.
Wishing you strength and peace