Yeah, no, it's probably both too much paracetamol (due you taking it mixed up with codeine) AND the alcohol you take. I'm 100% dry on alcohol and I only take paracetamol sparingly, without anything else mixed up (basically just when I have mild headaches), and my liver is doing just fine. 

Drinking is what really kills it, but no one is ready to admit that because muh alcohol is soooooo goooood maaaaaaan.