Let me analyze, there are two possibilities: first, she may know that you are interested in her, but she doesn't have that kind of lover's feelings for you, so I write this sentence to you just to make you give up her, and she only regards you as a good friend. Second, you are too kind to her, which is purely to thank you for being kind to her. But I think the former is more likely. If you don't mean that to her, explain it to her. If that's the case ... it's a pity that she likes you but doesn't love you. But I think she is a good girl. It's up to you whether you can grasp it or not.