I told her that she's very special to me and that I miss her?

She asked me why. It was the first time I had ever really said that she was special to me. The other day, when I told her I want her, she said "I'm nothing special", I didn't know what to say but just now I said "you're very special to me". And the reason I gave her was many reasons but the main serious reason is that we've known each other for a year. I've a hard time keeping girl "friends" and for her and I to have known each other that long really means a lot to me. The silly answer is that she happens to be something I love and she knows I like it but I think she just likes to hear it.

Did I make a mistake by saying this since when I said "I want you" she said "I'm nothing special"?
I told her that she's very special to me and that I miss her?
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