I had this a lot in my first days and maybe two-three weeks. (Today is day 36 for me.). But at some point then, while I still have those thoughts here and there, instead of reacting with a sense of loss of what will never be, my instinctive reaction switched to one of genuinely reminding myself that alcohol doesn't serve me well. Period. And the romanticize get ends.
Related to this as well, don't let your brain suck you into that possible day in the future. Focus on today... That is what is in your control. I always thought it was hokey before but what finally is making sense and supporting me is thinking only of one day at a time, and I start each day committing to myself that today I will not drink.
((Hugs)). It slowly does start to get better.