I often read that you shouldn't text too much. Also that you should ignore some messages once in a while. Also that you shouldn't text her for one whole day just to "leave her wondering".

But I just cant. I feel bad. I mean this girl is crazy about me (in a fwb-way not ltr). She likes me and we had sex last night but i'm so fucking 'afraid' that attraction will be lost because of too much texting. We text every day. We did for 2 weeks before yesterdays action. Today we continue texting. But I feel like it's too much.
And yet on the otherhand I can't 'leave her on read'. I just can't ignore her because we had a great time last night and we agreed to continue doing this.

I'm seriously confused. How should I change my texting? Or keep my texting interesting?
How fast should I reply? I often see that once in a while you should ignore messages and not reply at all and leave girl wondering what the hell happened but I feel so stupid doing this. I feel like I can't leave her without replying.