The chances of this being a "real" relationship are of course miniscule, but happy accidents do (rarely) happen.
So long as you maintain your common sense (which, thank God, you're doing... unlike so many others) then you have nothing to lose. Whether he can arrange a Tourist Visa to come visit you (very doubtful) or whether you go visit him (very easy) simply stay on the path you are now and don't turn into one of the sad idiots who so often get taken for a ride by a sweet talking, exotic, handsome foreign lad.
I'll wager you haven't done much international travel so a visit to Tunisia (and a few interesting places coming and going) could be a great adventure. Continue to protect yourself as you've been doing thus far and who knows what will happen. Never waiver from your common sense and street smarts though.