This is so me. My relapses have happened when I'm feeling really good. They rarely have happened when I feel bad.
In treatment, I read that some people use alcohol when they are very depressed, sad, lonely, etc. But some people use alcohol to "accentuate a high" or a good feeling. That was me. I think I have some slight mania going on sometimes, and this makes me think of all the partying and "good times" and is a huge trigger for me.
I need to learn how to accept these good feelings. Don't try to manipulate them to make them last longer or be better...just accept them and enjoy. Alcohol doesn't actually make the feelings better anyway...just turns the good feelings into impulsiveness and insanity tbh.