Apparently the guy who it got traced backed to 1) wasn't actually a close friend, just an acquaintance the player met relatively recently (after being contacted by the "fake" woman), and 2) had pulled similar stunts on other people in the past.

So it definitely isn't cut and dry, and I'm leaning towards extreme naivety on Te'o's part at this point (and possibly some embellishment to cover up embarrassment), although it definitely is a bizarre story either way.