I have to go do one of the hardest things in my life in a few miniutes.

If God is ready to take him he will.Let him know that when your time comes you will go look for him.

So sorry to hear about your friend. It isn't easy to be losing someone close or seeing them that way. Snake gave you some good advice. It will comfort your friend. You can also tell him that it's OK to go and that everything will be OK. Prayers are being said for both of you.
Frank