Is it a good sign if she smiles and says hello from across the room?

I really like this girl and tried to test the waters to see if she initiates anything. She and I locked eyes and she smiled and said hello. I think she was already kinda looking at me. I also was talking to someone else and she was giving a slight smile on her face when i said something slightly funny.
Is it a good sign if she smiles and says hello from across the room?
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