does he look, stare, orgle, or leer?
i think it's human nature to look, to admire beautiful
things/people.
But if it's more than just a glance, a look, then i think you
should bring up the issue to your bf. For all you know, he's not
aware that you are upset about it.
Communication is very impt in relationships. And communication is
definitely does not refers to only the exchange of lovey dovey
words.