dev is brainless in love

we heard about blind in love but our dev is brainless in love he believes any girl like without seeing her face n calls her so called"best friend" thats the limit of stupidness.radhika said the same lines to him n he is still wondering oh i heard that lines before duh it,s the same girl u can,t get that anyone would n he is from america well studied n stuff. one more logic everyone had diff voices so why can,t he get suspicious on radhika other than believing her for no reason.radhika is a stranger to him like from the begining. how can u trust anyone without seeing their face n living in the same house.in the beginning dev was k but now he is stupid all the chances he got to see her face n trusting her like that it,s so stupid. the creatives have to add some realistic sense to this show.