this has become a very daunting fear of mine, even in our small group of friends (all guys, if it matters) i've rarely spoken about my feelings about non traditional relationships. mostly due to my fiancee getting upset at the topic, this was before my coming out and now he has a much better understanding of everything and has stopped seeing it as a failing of his.
but even if i wasn't hoping for something more with someone, i would worry about scaring them off. it's not a likely possibility with these guys, we're a fairly unusual bunch but still. he has been friends with these guys since childhood, i would hate to ruin that for anyone.