for me it's less about the age difference, which is actually 8 or 9 yrs. though I don't really like a gap of that many yrs myself. but anyway, the age difference doesn't matter, to each their own. its the teacher-student relationship which is wrong. I don't even understand how a teacher can think of a student in that way, it's creepy, its sick. and even if now he's not her teacher anymore, he's her boss now, its not like you can completely erase the fact that he was previously her teacher. I don't know about others, but this is something I can't digest ever. a teacher is a teacher, even if you graduate, sure you can be friends or whatever, but falling in love..i find it odd, and yes still inappropriate.
besides yuvraaj and suvreen have something much more together. their not merely friends, they have that connection which is love. I like how they gel, how they are best friends, how their different yet get along so well. you said it well, they are frank, open and have a special friendship. their comfort level is on another level! and agreed the cv's of this show are being realistic with this track, and the way they are portraying suvreen as a normal person who makes mistakes, is emotional, and impulsive. shes not this all mighty protagonist who is perfect and never messes up. shes a normal young adult.