I was at a church service with a friend, it's not my thing but I know she is heavily devout and I go with her maybe once or twice a year.
Another friend of hers who I didn't know came and was sitting on the opposite side. At the end of the service she turned and started speaking to the other friend, I was on the left of her and this friend was on the right.
I thought I better shoot off soon as I had shopping to do. I waited a bit but they were just talking, so after 10 minutes I thought, I'm not waiting all day I need to go now
I tapped her on the shoulder and said, so sorry to cut you both off but I really need to get going now, it was lovely to see you. She looked surprised and confused.
Later on I got a text saying she hadn't expected me to leave so soon and she had only been talking to her friend. I understood, but we hadn't made any plans for after and I didn't know how long they were going to talk for, surely she didn't expect me to just sit and wait indefinitely?