The most distressing dream I ever had wasn't a nightmare.

I will make this quick. Maybe this won't stand out in the sea of dreams in this subreddit, but I need to get if off my chest and I don't want to tell anybody about it. So they say you cannot create new faces in a dream. Your mind simply can not comprehend it. I had this dream. It was a normal life. I was in school, sitting next to my friend talking. I do not remember anything I said to him. Eventually I stood up to talk to this girl. I do not know the context or why we started talking. But eventually the conversation turned and she asked me on a date. Without question I accepted. And then I got this feeling I have never got before. It felt so real. But I've never felt it in real life. And then, the next thing a remember it's a couple days later. I'm pacing around my house texting her. She texts me that she changed her mind and that she wasn't coming. This bothers me very much. The next thing I remember it's a couple more days later and I see her again. She apologizes and we become friends. And then I woke up. To anyone this sounds like a normal dream. But I've been thinking about it since. You see, I've never seen my friend from the dream. I've never seen the girl from the dream. I've never seen the house I lived in in the dream. I was not me in the dream. I do not know why this scares me so much but it won't stop bothering me. Any advice on what this means would be greatly appreciated. Maybe I'm overthinking.