I can see quite a few differing thoughts here. Hard to choose which would be the best path. But I say at least let him hear from you your thoughts as to what you think about homosexuality and that you have nothing against it. Maybe you could be direct with it and tell him it's his choice but you will still love him no matter what. Or maybe it doesn't really pertain to your own self and you should let him choose whomever he wants as his partner would be his choice. But seeing that you care for him and only want him to be safe and happy, I'm sure you're going to do alright however you handle it.