I did go on 2 dates with a girl, I had twice sex. She did want a 3rd date but I didn't have time, so she was pissed off about it. After a month (today) she texted me with "hey what's up?"

I don't really want to date her again, because I want something new, but I'm also not trying to he that guy that ignores her.

What would you do in this situation, any advice?