Now following are my observations that support my suspicion.
* Whenever he talk about his friendship with Bani with anyone, he keep saying ' jaisa rishta hota ha waisa he behave kiya jata, woh jo umeed mujh se rakhti hain, us umeed ke badle me na woh koi aisi baat mujhe kehti hain na waisa rishta ha' as if she want her to say something and make some special relation and then start expecting.
* In one unseen video he said that when you have a 100% wala relation with someone in this game about whom you are fully sure that this is the person then you can even accept defeat happily to make that person win but you can't do it if relation is of 95% wala.
* He says to Bani many times about something that I won't do it in firm way but then after five minutes go to her to do the same thing to make her happy. Eg. That door fight scene in luggage area, today giving money and asking Mona to sing song for him.
* He is clearly jealous of Bani-Jason bonding. Sulking continuously and showing his anger in stupid ways.
Its a question and not something confirmed. I'm still confused. Please share what do you think?
I hope its not true. I don't want any love angle and wish everyone to play individually.
EDIT
Ok so here's conclusion based on all the comments:
"For Gaurav only a girlfriend has right to ask or expect what for Bani a friend can ask."
I don't think it has anything to do with how old is their friendship because in unseen videos whenever Bani tease him by saying that as yet I understand you only 10% or 15% then Gaurav get irritated as he think they've spent enough time together that now there should be no confusion between them.
Maybe he came from that school of thought where 'Ek ladka aur ladki Kabhi dost nahi ban sakte'.
btw if this friendship thing was imposed on him then he would consider Jason as a blessing or relief but that's not the case. He never leave Bani after saying or doing something harsh the way he left Lopa yesterday.