Not much of a blind date if we actually know each other.

[He points out, looking quite relaxed even as he drops the pretense. He had the opposite thought, after all, preferring someone he at least sort of knew compared to a complete stranger. Had he chosen to sign up willingly, he might have a different countenance. However, since this was pretty much his friends' idea, he can just namedrop them if it was too embarrassing.]

I didn't know you used apps like this. Did you expect to run into a classmate?