Is Upen Jealous of Gautam?

While we have all seen their comfort level and attachment, but looks like their equation is a tad bit more than "just friends" now. Fellow passenger Gautam Gulati and Diandras's closeness is becoming more and more conspicuous with each passing day. So much so that they were even seen holding hands and sleeping next to each other; something that probably isn't going down very well with Upen.
Quizzing Diandra on the intimacy between her and Guatam - Upen was seen commenting - "Kya Ishq Wishq chal raha tha kal raat ko?" To which Diandra responds -"Tune bhi toh khayal nahi rakha na Upen". Ending this conversation Upen remarks saying - "Oh toh mujhe replace kiya hai?!?"
Will this change some equations? Will this break friendships? Or can it lead to a budding new relationship? Only time will tell.