This all happened when I was in my twenties. I had a tendency to put girls on pedestals back then and my girlfriend at the time was no exception. She had been through a lot of bad stuff and it made her very hot and cold, so much so that we decided to keep things open and see other people. Which was really a blessing since she was driving me crazy! So I started going out with a number of girls that I knew, most of them from an extended friend group. We were all in really good shape and all generally open and accepting so it was no big deal that I was going out with them.
One of the girls I asked out was this girl I will call Sandra. Sandra was the kind of girl that everyone loved and who constantly did nice things for other people. When I started going out with her several of our shared friends took me aside and basically warned me not to do anything that would hurt her. I knew she had broken up with some guy about 6 months ago, but it seemed that she was still pretty upset about it and they wanted me to be careful. Yes that is the kind of girl she was - everyone was looking out for her.
This was really fine with me because I was already hooking up with a couple of the girls I was seeing and it seemed fine to have just a friendly kind of thing going on. Plus Sandra was just not the kind of girl who tried to be sexy or flirted very much. A good girl as they might have said in the 50s. So on our first date I planned for a dinner out and then if things went well watching a movie at either her place or my place. The movie part was kind of up in the air and no big deal since we both had roommates. Dinner was pretty low key. We laughed a lot and talked about mutual friends and what was happening with them. At the end of it I mentioned the movie and she said I could follow her to her place.
We got there to find that her roommate wasn't home, which did not seem to surprise Sandra. Looking back this seems like she might have planned that, but at the time it did not seem to be a very big deal. I was still thinking of her in that friend zone kind of way so it never really crossed my mind that she might be thinking something different. We started the movie and settled on the couch to watch it.