What to do if not returned?

So I've really liked one of my guy friends for a long time, and told him so last Sunday. Well since he was driving me back to my car, and I said it right before I got out, he didn't answer me because he was shocked. He's been gone all week, but I probably won't see him until Sunday, so I won't know until then.

My question is if he says he likes me as a friend, how should I answer then act?

I'm okay if we are just friends, but we are really close friends, and we have a more caring relationship. Like he has other friends who are girls, but he doesn't care about them as much. Not trying to be self absorbed or anything, it's just we are really close friends.

What I mean by close friends is he always makes sure I'm comfortable (like movie night at his house with a bunch of friends, I was on the floor with other girl friends, but he only kept making sure I was comfortable). Or he sits by me at church when I'm alone, asks about my day, teases me etc.

Every one of my friends think it'll go well, but I want to be prepared if it doesn't. They also agree we are super close, and I don't want to ruin our friendship if the romantic feelings aren't returned.