laagi tujhse lagan had a love triangle bet datta,nakusha nd supriya. It can even be called a square if the other guy is included.
pavitra rishta has a love triangle bet manav archna nd shravni
uttaran has a love triangle or more rightly a square bet the 4.
Dmg has a lowe triangle bet arman riddhima nd siddhant.
Yahan mein ghar ghar kheli,yeh pyar na hoga kam being other shows having a love triangle
all the above apart frm dmg are top shows having the common link of a lowe triangle. The only diff being the way in which it has been presented.
So its not that a triangle wouldnt work its just that it has to be presented in a unique way like above ment shows.
Regd rajat ,anoosree ment in the ph fc tht rajat might be the younger version of the parallel lead bec devarsh and rajat are of the same age. Even i think it might be a possibility