This last night I had this dream where I was sitting at a table with a cute girl on the other end, and suddenly I started flirting with her, gazing into her eyes and smiling, and we were sitting like that for perhaps 5-6 seconds.
Then she suddenly told me that I “needed to smile more”, and that she couldn’t see me do it, so I smiled more and more (not a freaky-looking smile, though xD) until she eventually said “yes that’s more like it, now I can see your smile”.
I must say it did feel really good during the dream, and I tried it when I woke up and I loved that smile when I saw myself in the mirror.
Should I think of this as some sort of lesson, or is it just a funny coincidence?
Was this girl trying to tell me that I don’t smile very often or something? 
I’m not very fond of deep dream analysis and so on, but sometimes dreams do give rather accurate advice or hints. I guess it’s pretty well possible that you’ve picked up something from other people’s reactions or maybe you’ve thought about it yourself and didn’t quite realize it, which is what influenced the dream. I say take the advice, laughing and smiling are good for the health, after all. 
