Assuming YOU are a guy ....
girls are always hoping to find a relationship. So if they LIKE you, they will ALWAYS text back.
And if they don't . they aren't interested in you in THAT way.
She's not interested. Girls will get SUPER creative when it comes to talking to guys they like. She might take a little while to respond (can't seem to eager!) but if it's too long, or if she never responds, she's not interested.