I'm super impressed that you got this girls number and that she gave you such positive responses to your texts. Take a moment and read over the texts above again. This shows that she was very interested in you.
If you were her, would you be confused as to what you were looking for. She was waiting for you to make plans to meet up with her. Your texts seemed to be focused on making small talk, so she got bored and stopped texting back.
It's not bad, it's just a lesson to learn. You can't get mad at her for not texting you back. She was really friendly on the first few texts. Rinse and repeat with another girl today and do it a little better. This is how you get better at pickup.
I love your enthusiasm. Keep it up!