not knowing your family history, it sounds as if they are quick to "judge" based on little evidence. some family systems are like that. the bit about renting i just don't get.....
you'll have to decide if having your parent's approval outweighs your own inner compass. there is no rule here.....
three years sober is a good base. as lexie said, length of sobriety is no protection against relapse......the ONLY protection is to never use again. ever. there is no such thing as immunity. only a reprieve.