I know exactly how you feel.
I had a wee drinky problem for a long time toward the end of my time in the army, it had gotten so bad i was having nightly drinking competitions using 90% proof Brandy. I got the kick in the butt that i needed when i collapsed with kidney failure, i was told by the doctor i had to stop drinking i would die.
I won't lie, when i tried to give up it as hard, it was painful, and the craving was hell, but i got through it, over twenty years dry now, and very glad i got through it.
I was left with some side effects, my short term memory is trashed, and i have some trouble concentrating, diagnosed as minor ADD, and because the only way i could combat my concentration issues at the time to strictly order everything i do, i got so used to doing that i developed mild OCPD, and boy when these three things clash do i get one heck of a headache, i regularly make a list, get halfway through it, wander off to do something else, then forget i'd ever even written a list, LOL.
Anyway, i digress, one of the things i found shortly after quitting, was the lack of motivation, i just really couldn't be bothered to do anything at all, even getting out of bed was a chore for me. It takes a while to get back on track, you aren't on a high anymore so everything seems boring and pointless, but you do get over it, i found that if i strictly scheduled my days, and made myself stick to that schedule, with plenty of downtime between tasks it became easier with each day, i also found that bringing new stimulus into my life really helped too, pick up a new hobby, something you've always wanted to do that you haven't gotten around to, mine was painting warhammer models, which really helped because the fine detail painting helped me concentrate, schedule a couple of hours a week specifically for that hobby.
It will take a few months, but it does get easier, life will never be perfect, drinking too much will always stay with you, and effect your life, but you can limit its effects.
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