Yes it is obvious that it is sarawat bcz he is the one who will always ask "CAN I TOUCH UR *****" AND ITS OBVIOUS THAT IT IS NOT TINE BCZ IF IT WAS TINE HE WILL BE LIKE " NO WAY "😂
This is obviously a BL couple providing minimally acceptable behavior. They answered honestly including the hesitation (silence) about being best friends. That spoke volumes that their romance is on-screen only.