Hi OP, even after your comments I still don't get it. If I texted happily with s.o I thought to be the guy I met last night and gave my number to...and when we meet it is a completely different guy whom I never met and whom I never even gave my number...the first words spoken would be: "WHO ARE YOU? I thought I was texting Bill (Mitch, Dan, Tony etc). How did you get my number?" Why on earth did you "have to pretend" you knew him? Why not say: "But texting you the whole day was fun, so even you're somebody else, let' s keep talking" OR "I am sorry, you seem nice but I am really just interested in the guy I gave my number to"? Why is it so hard to clarify things when it was definetely not your fault at all? And you still didn't ask how he got your number, even though it bothers you and you think it's kind of creepy? I don't get it. Just do something and don’t call it an FML and complain. ( Yes, I admit it, I just want to know how he got your number, don't leave me hanging there!)

Okay so. Judging on all the information I have read. I am going to assume that the poor guy was given the wrong number from some girl in some other bar. And that he felt just as awkward.

Well it may just be the best mistake of your life.