How did you stop drinking?

Hello everyone, A few months ago I had to quit smoking grass due to a job I wanted. I really struggled to stay sober and in the end took up drinking. Ever since I’ve practically gotten drunk every night and I can confidently say it’s making me hate life, but I don’t know how to stop. I’ve gained weight, I’m always tired, and I’m spending way too much money on booze that I end up drinking alone. I don’t want to keep going like this… any tips or suggestions would be much appreciated.