Thinking about calling it quits! Thoughts?

Sorry it’s a little long... Currently trying to decide when enough is enough! I’m just becoming more and more burnt out with our marriage. I don’t feel like I’m a priority. My husband is addicted to pills. He always spends all the extra money we have on his addiction and I am always scared to spend money on myself for fear or it digging us deeper in a hole. The addiction has got us into so much debt and I can’t see a light at the end of the tunnel. Right when I thought we were getting somewhere with the debt, he springs it in the that we’ve got an additional $11,000 in debt that he had been hiding. Ugh! Our life revolves around whether or not he has pills. I’m just tired of not having shit when I work my ass off and make good money. On top of that, he rarely wants to have sex... maybe once a month. I walk on eggshells all the time bc when he gets pissed he gets in a rage. It’s a rollercoaster... it’s either really good or really bad. He’s also somewhat controlling. We do have fun at times and it’s not all bad but I’m just tired of all the bad stuff and I’ve tried everything I can to figure it out. It just seems the pills are more important. Anytime I try to talk to him about the addiction, it gets turned on me I get the blame. I’m scared of throwing away our marriage and regretting it but at the same time the freedom and happiness of not being in the marriage is so appealing. What are your thoughts? I’m so torn on what to do. At this point I just think I’d be happier alone. I’ve been dealing with this for years and I’m just over it. I’m tired of hoping for a change.