Well..i would say he was wrong...though unintentional as he never told he likes her...he never told her that she was more than a friend for him...so he was doing it unintentionally..not hurting her by will...but still jo kiya..galat kiya..
But again that doesn't mean...that u go and take revenge for it...not just taking suvi's example..i would consider that a wise decision in real life too...or try to separate them...like suvi after she came to know yuvi doesn't feel the same...and when she saw him with alisha...she got jealous, felt bad...but never tried to make yuvi or alisha any harm.
Same goes for yuvi...when he thought tht somethng is going on between RC and Suvi...he never tried to run over a car or tried to separate them..but instead..went away...So...it' like...true love..if u really love someone..u let it be...rather than trying to hurt them in return.