it depends on your definition of friendship - and that varies from person to person.

many straight guys - and women - feel that you are not really friends with someone if you would fuck them, given the chance and no emotional ties on either end. a lot of straight guys are never really friends with women for this reason - it would be possible to fuck them in the right circumstances. and in a way, i can see it.

after all, it's not a non-sexual friendship if sex is part of it on one person's end. if someone looks at a person and feels horny, it's sexual - whether it's acted on or not. and if non-sexual is part of the definition of friendship for a person, the answer here might be no - unless he is REALLY not your style.