I was chatting with a friend on Facebook yesterday and at the conclusion of our conversation
I said,
"i gotta go. Got some studies to do...it was nice chatting with u :-)
catch u later...."

and she said,
"hmm ok ok all the best then... bye tc me too enjyd n my pleasure :-p okayy"

Now, from my search on Google, I discovered that the tongue out smiley is used to express feelings like giggle, shyness, silliness or sarcasm...but in this particular case I'm not sure what it really means...so I'd appreciate it if someone provided their input on what they think it means.

Thanks. in advance.