You sound like where I was headed, but I caught myself, stopped drinking except on weekends, and started working out. Now, I love weed, I love being high; I like alcohol, and I sometimes like being drunk.
Ive had the same revelation... like sometimes i get drunk every night for months on end, but then that usually stops with two or three nights of blackouts in a row, then i dont drink at all for a couple weeks. I then start smoking more and more pot, till after a few months of that i become completely burned out and cant get high anymore. So i go back to the drinking..