This is a hard subject to bring up (no pun intended).One way to handle it is to talk about the subject of homosexuality, without directly addressing him. Talk about how he feels, in general, about homosexuality and bisexuality.Talk about the fact that all humans are bisexual by nature, but that society forces us all into a heterosexual ‘box’ so that men and women will marry, have babies, thereby insuring the survival of the species.If he tolerates a neutral discussion of the subject, you can then bring up more personal questions. You will need to use your instincts about when and if he will be available for a more in-debth discussion.If he is defended against his homosexual impulses, he will probably become upset when you point direct questions at him. There isn’t any way to sweeten that blow, I’m afraid.However, you can try talking about your own homosexual impulses and fantasies. You can remind him that these feelings are universal. You can also remind him that these feelings need never be enacted.Many’straight’ people permit themselves the free-flow of homosexual fantasies, while never, ever enacting them, thereby protecting their heterosexual relationship. If you are truly concerned about his being gay, and you don’t address the issue, you risk being heartbroken down the road, if and when he discovers that he wishes to live a gay lifestyle.So, I can understand your wanting to obtain reassurances that he has no intention of enacting his homosexual urges now or in the future.Good luck. Let me know what happens.