If your friend is gay, then there's Not much you can do to
switch his sexual preference. Some just prefer their own gender,
some were so hurt by their exes that they turn to their own gender
instead.
No matter what, don't you think you should respect your friend's
choice? I certainly wouldn't appreciate a friend telling me who I
can love or Not! You can be there if he needs your help or a
listening ear, or even a slap sometimes, but we have No right to
lead the life of others.
I'm perfectly heterosexual, but I think gay people are sensitive
souls, & most are very nice. They can't help their gender
preference, & maybe you ought to respect that.
FeowFeow