My big piece of advice for stopping alcohol would be to find a better way to occupy the time.
I used to have a big drinking habit; I escaped that habit by spending more time exercising/pursuing a sports related goal.
I'd be so tired in the evening from training that I wouldn't feel like alcohol, I'd just want to relax. My body would feel too fatigued to drink alcohol.
Also; I discovered boredom is a trigger for me to indulge in unhealthy habits (alcohol, marijuana, bad food) just so that I could be doing something rather than be feeling bored. Alcohol makes the boring times seem more tolerable and pass a bit faster.
Also; you might not want to be as extreme as me but I ended up leaving behind all my friends that drank alcohol and did drugs; I discovered that when sober together we had nothing in common and the only way to spend enjoyable time together was to be drinking alcohol or similar intoxicants. Life is about balance; if you want to lose weight you've gotta sacrifice alcohol. Make sacrifice and the universe will reward.