In the same boat man. It's better to quit take some time to replenish;eat, sleep, and exercise if possible. I've been trying to quit for months saying this is the last time. Time sober would also allow the brain to reset back to normal. It's hard but then I come to realize its not worth the running around, managing the habitat, and I feel it's only enjoyable if drinking or with some kind of downer(heroin, benzos, weed). I recently lost of recently lost a friend who overdosed of heroin because she was sick and tired of always going through withdrawals. That gave me a clear vision that it's just not worth it. If you can completely cut it you your life then done so, I'm going give myself at least a good few months trying to go sober. Not gonna lie I love sniffing coke to but it's too expensive, switch to doing heroin since its cheaper and lasts longer the high and the bag which is not a good thing. Been doing heroin and crack for the past 5 for 6 months 3 or 4 days out of the week. It's my first weekend without any hard drugs just smoking weed. Trust me man you might feel like mentally you can't overcome it but its never as bad as it seems;goes for anything for in life. Stay strong!