What song is this? I really have no clue.:o?

"When I saay hey , then you say whatsss up . And I'll be like babyyy , do you miss me ? When you say yes , I say ditto . Then you hit me back with the less thaan symbol number three . ( < 3 ) I got a clue how you feel for me ; 143 a smiley with a winkyyy . Thats how you feel? Baby that's whats up . A hundred forty characters, is more than enough"