Question: how would you describe  this dream ? When you dream about someone and it feels so real like it was really happening !

Answer: I believe the word you want is "vivid".  You were just in a light sleep.  The more "awake" your brain is while you sleep, the more you dream.  Your brain was just pretty awake that night.  This can be confirmed sometimes by a lack of sleep quality.  Do you feel as rested as you normally do?
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