I was tested once while staying in a not very nice hotel with very big metal doors and gates, I can't remember exactly what it was but my liver results were sky high despite not drinking for months.
I took the vitamins they gave me and re tested a month later and all was fine.
Are you on any medication at all?
I've not had my bloods taken in a long time almost like what I don't know won't hurt me, I don't drink at all now I don't drink or smoke so I'm hoping all is OK.
You need to quit smoking or eventually you'll be told some horrible news that you possibly won't be able to do anything about until it's to late.
I'd be more concerned about my lungs than my liver if I'm honest