Well, I think its okay to lust over someone you love. It's normal. 
But if she's the conservative sort, I guess you gotta restrain
yourself and not prowl all over her at the snap of your finger and
frighten the poor girl...
And I do agree that guys can lust but not necessary love but love
and lust wld go together.
So it's normal. Just take it slow whether you are bounded by
religion or out of respect for your partner. Perhaps more
communication & understanding need to be warranted fr both
parties.
That said, dun worry. In fact if I were the girl, I'd rather my
partner lust over me than anyone else. Sure, he may drool over some
pin-up babes or a gorgeous passer-by... but ultimately, it's
me.. Me.. ME!