what does this mean "que lindo eres", it was not used as a question
HI burky, welcome to the forum
Please remember this is a learning site, we all need to use correct punctuation here
Here's another link that will help you, burky31!
Read about the word qué here in SpanishDict.
The phrase should have been: "¡Qué lindo eres!"
In this case, que is used to mean "how". Now I'll tell you a little trick that you'll find will come in handy here, double click on each of the rest of the words in the phrase. Since verbs in Spanish include the subject, add "you" to the definition for "eres" since it is in the tú form of the verb.
So, what did you get?