Is a fifth every 3 days bad ?

Hello everyone. I’ve been a pretty heavy drinker ever since I turned 21. It got bad for a while, until I eventually had to get sober after becoming homeless due to alcohol and drug abuse. I’m still sober from drugs, including marijuana, but I’ve found myself drinking more lately. I drink every night. My current drink of choice is Bacardi Black rum. I don’t get very drunk each night—usually just a nice buzz before going to bed—and I never wake up drunk or hungover. However, I feel like my tolerance is high, and I’m going through a fifth every three days. How bad is this for my liver? Should I try to slow down? I’m taking a job in March that’s going to require me not to drink whatsoever, so I’m under the somewhat delusional conclusion that I can drink however much I want because I’m quitting soon. But honestly, I’m concerned about my health.