How can I be interesting for a guy that already knows me?

I have been texting with a guy that I am attracted to and according to him, he likes me too. I've been the first one texting pretty much. However we seem to get along when we text and our conversation flow in every topic. But I would like to know from all of you girls how can I be more interesting for him and make it exciting everytime we text so that it doesn't look like I'm the only one interested? Thank you all