My dreams,what do they mean?

Sounds like there may be some anxiety in your subconscious. The darkness of nighttime, the rain, and the unidentifiable person could point to a something that creates confusion. The running, fear, and weirdness suggest some anxiety. If the flying is like you are floating over things that are happening, it may be that you feel like you lack control. Having dreams of old places, weird places, and people in odd places could relate to some sort of role confusion that you are experiencing.