Dreams

In most of my dreams, I always end up alone. Even the dream starts with a dinner or a trip with a bunch of friends, I somehow turn out sneaking around on my own, looking for something that I don't know what exactly is. I had been looking for a platform inside an unknown subway station, and I had also sneaked out in the middle of a high-table dinner and ended up wandering on the street alone. Can someone tell me what that means?