I am with you-I was sober for almost 5 years, and I can't even remember why I began drinking again. I've been trying to quit for 2 years and was able to go a couple of months, weeks, days, but really couldn't get that same momentum that I had in the first place.
I finally realized that I'm in a different place than I was then, and achieving sobriety can be just as exciting as it was the first time, because the road to achieve success will be different and I will find out new things about myself in order to recover.
I still wasn't doing it, so I started increasing my exercise, began rekindling my spirituality, eating healthier-and it became so clear that alcohol was in my way and actually killing me. I started researching different paths to sobriety and imagined myself following them or what I might need this time around. And bam. No drinking. I'm done.
You can do it-you absolutely can!