Welcome sneeley -
I experienced the same thing: I'd been sober for years and "knew better," but decided one day to have "a couple drinks." Once I did, it slowly took over my life just like it had in the past. I couldn't stop either until I came here and got involved in this community.
I don't think you have to be miserable in sobriety like you were before. You can do it differently this time, get some help for some of your underlying issues, figure out where the misery comes from and what works for you. Hope to see you around the forum!