Umm, it's a blind date and that means your friend thinks you "might" connect with this person and not that you must connect with this person.
So barring that you don't jump right into bed with him, here are your end of evening options.
a. I had fun tonight and it was great meeting you, but I don't think we are a dating match.
b. I had fun tonight and would you like to hang out again as friends. (ie - states no romantic interest at this time)
c. (Not interested) I was great meeting you, good luck with everything (or It was nice meeting you, I am sure I'll see you around.)
d. Interested - ... Ask for another date!
Basically, be honest and be open to a fun night and not thinking you are in a relationship.