Just remember it's not a blind date, you've already been out with him a few times, just not alone. But that really doesn't change too much. He's still the same as when the both of you went out with him.
If it's too stressful, pick an easier venue. Dinner and a movie maybe. Of even just coffee, that's pretty low stress. Just remember, no guy is going to write you off after a date even if you aren't as charming as you would like to be. And, because we still live in an old fashioned world, most likely there is more pressure on him to impress you then the other way around. You'll be fine.
Take the risk of thinking for yourself, much more happiness, truth, beauty, and wisdom will come to you that way. - C. Hitchens
Me: Male, bi, 48, flexible