I agree the present guidelines suggest no treatment if ALT is normal (< 25 IU/L for women, < 35 IU/L for men) and hbvdna < 2,000 iu/ml. You did not specify your age and HBeAg status. Very low ALT in itself should be investigated (Vitamin B6 deficiency?). When hbvdna is high, it usually causes inflammation and ALT to rise. Your case is very unusual, to me. Have you ever had a Fibroscan or other non-invasive fibrosis scores?
Take vitamin D and your Hep DNA will go down.