Boyfriends are like bank accounts - without much money, they don't generate much interest. Since the 'boyfriends' in Girlfriend are at ground zero financial state, you can guesstimate the levels of interest they would evoke from their respective girlfriends… and the audiences.
Girlfriend is a pukka Telugu movie - your regular gen-X leching at girls, a little bit of lecturing from clones who double up as professors, love affairs etc. However, we've got to give the devil its due. Girlfriend is also daringly different in more ways than one.