I think you should consider the possibility that you have a drinking problem. But, no amount of rehab is going to work well unless you decide you need help.
You sound like an intelligent guy who understands the risks of mixing the drugs and booze. But the stickler is the part about you not caring. Sounds like if you cared, possibly you wouldn't need to drink???
I hope you make the right choices. Have 2 siblings who are alcoholics. It's hard.