Yes, you can definitely have boy-girl interactions in Bennett University and hangout with each other.
Bennett is pretty much chilled & cool in these aspects. There are no bounds to such stuff. You can hangout in the campus, off the campus, in the class, anywhere; except in each other’s hostel (you must have saw this one coming). No one will ever stop you interacting with opposite gender.
And regarding harsh rules, there is none as much. Sometimes, they might be a little strict (not violent type!) with studies & attendance (but it is for our own good, trust me).
So I would suggest you to enjoy life at the Bennett fully but also give equal emphasis to studies & maintain good grades.