Most Helpful Guys
I mean it's always impossible to tell off of one little statement like this whether a guy is into you or not.
That being said, I agree that sweet dreams is a more intimate gesture that is usually reserved for a boyfriend/girlfriend or someone you are interested in. At the same time though, it depends on the guy, some guys are naturally more sweeter/kinder and would use this phrase for a girl who they just thought was a really good friend
If she and I are just friends, I'll say "good night" or "sleep well". If I like her, I'll say "sweet dreams". That's just me, though.
Most Helpful Girls
I think for the majority of men there is a small romantic inclination behind it :)
It means when you go to sleep... have sweet dreams... instead of bad ones...😐