If a guy remembers things you have said in a conversation and mentions it later, is it one of the many signs that he may be attracted?

other signs:
  • smiles big when he sees me
  • I think he gets nervous (scratch his head or neck a lot)
  • does a cute small laugh when i am talking with him
  • when I am worried about things he speaks in this soothing or low tone
  • has sent me a wink
If a guy remembers things you have said in a conversation and mentions it later, is it one of the many signs that he may be attracted?
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