Girls, what does it mean when you use the "😊" emoji after a goodnight text?

So there is this girl from my school who I talk to quite a bit because of homework etc. The other night we were texting each other back and forth about some random stuff and I eventually said goodnight to signal that I was going to get some sleep. We have done this before on a few occasions but this was the first time she has ever used the 😊 emoji. I was wondering if this means anything special. I also do have a crush on her so yeah...
Yes it means something
Nope your imagining things
How the hell should I know
Other? (Just here because...)
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Girls, what does it mean when you use the "😊" emoji after a goodnight text?
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