ترجمة - إيطاليّ -انجليزي - tu sei molto dolce come ragazza

Perhaps:
'You are very gentle like a sweetheart'
?

Either you say "You are were very sweet as a girl" or "You are very sweet for a girl" I feel the second one is the closest to the original Italian text. If not then "You are a very sweet girl" Please it seems that exact translating overrides correct grammar more often than not.