I wasn’t even going to ask her out because I thought she was way out of my league. I only did after another guy I was friends with started dating her roommate and hinted at me that she was hoping I would ask her out. The shock of my life. Now married 12 years with 2 kids.
I think inviting someone to your place is pretty implied that it’s a hookup and most people wouldn’t be into it unless you know each other fairly well. But because it’s a college environment and everybody is near each other and in dorms, it might seem more casual.