You Were In My Dreams - How Do You Respond To Dreams About You Last Night?

Give a nice smile to that person and say - “That's surprising” and you can leave that conversation there. If you do not want the details of the dream, they would get a hint that you are not really interested. But if you are curious then you can take the conversation further by saying so what was I doing in your dream?

How do you say I was in my dream?

I would write: Last night I dreamed about you. I dreamt that you were here beside me.