If you think that they will be accepting, then just kinda go into it
I'd suggest telling them in person, just being like "hey, I'm like this, would you please accept me?"
That's way better than the first person I came out to, I came out to him by asking him out and it was not a good idea
But just try to be nice about it, don't make it seem like you're forcing them to bow to your every gay need or anything