I'd had a high school reuion party at Hongdae, but the party was over too early. So, some of us decided to drink more at a park located in Hongdae. At the park, there were a group of girls sitting on a bench, holding a bottle of beer. And, most of them were pretty, so we decided to go there and talk to them. It was a lot of fun because I ('d/'ve) never done that before. The (gathering / meeting) was over about an hour later. We had been talking to them for about an hour (before/until) the time when I had to go home to be on time for the last bus.
I think 'd is right because I'm talking about my experience until I met them.
I don't know what I should choose. can you give me an advice?
I think until could imply that we had been talking more than one hour, so that I missed the bus. but before would never imply that because the event of talking to them has to be finished before the time I had to go home. I think depending on what I mean, I can choose which I should use, right?