What does your a great guy mean?

My friend texted me saying how she was sad lonely and tired. That she gave her boyfriend a promise ring. She said I'm going to be faithful to him or someone else. Then she went to saying how she wants to chill. But I didn't want to. She then texts me out the blue and said your a great Guy. What does that mean?
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What is a great Guy?
What does your a great guy mean?
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