indifference, maybe?

it takes a certain kind of girl to be quite incurious of her boyfriend's past amours..

a certain amount of diffidence and security to not care much about who he's been with and where he's been with whom.. (does that make her apathetic?)

a certain amount of faith and trust to know that there won't be any sort of recurrences and renewals with old flames.. (does that make her blasé?)

a certain amount of confidence and belief in the relationship she has with him that these things don't really matter.. (does that make her detached?)

a certain amount of benevolence and will that she wouldn't really be envious of any previous dalliances of his.. (does that make her disaffected?)

and it takes a certain kind of guy to be equally incurious of his girlfriend's past too.
(does that make him indifferent, maybe?)