I had a friend who would take really long to respond to my texts and I would have sent like three times the content because I would pour out my unfiltered thoughts a lot. They would only reply to the one topic they wanted to talk about. At first it made me feel a little nervous that they didn’t want to hear about some stuff and weren’t reacting to it, but they explained they were fine with it. So, I was basically given the go ahead by someone to say just whatever I was thinking. So whenever they did reply and I heard the notification sound they had found whatever I said interesting enough for them to want to start a conversation about it with me.