Have the Tables Turned?
This is a good sign. From the looks of the conversation, she is negging you in a playful matter. If she didn't want anything to do with you, she would be giving you way different responses.
The way you brushed her off was good. It showed that you had confidence in your appearance and you didn't care what other people thought of you. In the second conversation, your return fire neg was perfect. It showed her that you were a playful type.
With what I have said up to this point, don't get ahead of yourself. Just because it looks like she may be interested in you, it does not mean it will be the same way in the next conversation. Just make sure you keep your cool and stay natural. Continue to play along with her, and you'll be alright.
"There is no better than adversity. Every defeat, every heartbreak, every loss, contains its own seed, its own lesson on how to improve your performance the next time." - Malcolm X