<human>: Can you give me the gist of the text in a nutshell?

Some background. We're both 22. Haven't really had a relationship. Maybe been flirting for about a month. 

I am 4ish months out of a two year relationship.

Anyway, we had been flirting, and I really, honestly do like talking to this girl, but I have recently come to the realization that I'm just not looking to take this to the next level, which she clearly is. I like the flirting and all, but am not interested in anything more. And it started to feel like it was intensifying.

Thinking that maybe I just need some time to process this in the context of my relationship life, I semi-backed off without telling her because I didn't want to jump the gun. So while I still talked to her, I obviously wasn't being as flirty. This had been going on for about a week.

Last night she called me out on the change, which is her right, and I explained to her that it was nothing that she did/didn't do, and that I just can't promise her that this will develop into anything in the future, which is what I feel like she wants. I told her that it was very unfair to her to continue to just go through with it, if I wasn't able to progress past a certain point. I also told her that if she understood this, and wanted to keep it casual, I didn't necessarily want to stop. Sadly, she contacted me kind of late so I had to go to bed for work, but I told her I would continue talking to her today.

What should I say? Any hints? I feel shitty for leading her on to a point and not communicating right away, but at the same time, like I said, I do enjoy talking with her, and the flirting is fun. I just am not seeing it going past a certain point.

Lastly, she mentioned that it was like I had, 'just flipped a switch.' This statement, and the relative truth to it concerns me.
<bot>: Girl I have been flirting with called me out on change. Opened my eyes to certain things. Need help on doing right by her.