Dude... I am praying for you.

Maybe you don't need to come out to him.

If you didn't go to anything illegal... just tell him you have a porn addiction and that you cruised to a few questionable sites on his puter. Tell him you confessed to your pastor and just ask him to descretely delete his internet history. If you do this at his house and ask him to do it while you are there... he may not have to see what you visited... and if he does notice.. then you can talk it over with him while its fresh.

Godbless you bro. Trust in His mercy.

Much love
Cat.