Hi Eleny ! You're definitely not alone... I did this for a long time & even though my mental health issues are "diagnosed and treated" I still indulge & still binge. Alcohol definitely does make you feel good if you're not feeling good. At one stage in my life I did not know how I'd sleep on the odd night I didn't drink & guess what ? Didn't sleep.
You've come to the right place, you're definitely on your own, take care & don't be afraid to talk