Concerned Mom, if you can get his phone number, google search on that, see if you can find any more clues. Also check his email address, see if that leads you to anything public about his interests, business, location etc.
Do you know about how old he is? Any photos? Do you know where in Oklahoma he is based? Do you know if he has other nicknames, is he a musician or artist, any of these clues could help us narrow in on who he is.
Where was the event he and your friend were at?