<human>: Could you distill the essence of the text into 1-3 sentences?

Last Friday I went out with a girl on a first date.  She was sweet.  We were having a few drinks at the bar when she invited me over to her place.  

I agreed.  I'll skip the gory details, but we spent the better part of the weekend together in her bed.  I didn't get home until Monday morning.  

This would be a great success for both of us if we'd agreed it was just a fun weekend fling.  Only we didn't.  I'm a sucker for romance.  We snuggled for hours.  I whispered sweet things in her ear.  We danced in her bedroom.  We cooked for each other.  

Before I left I told her I'd see her again this coming Thursday.  Now that I've had some time away reality is quickly dawning.  I'm not *that* into her.  But I definitely gave off the impression, even in just those few days, that I was.  

I'm not sure what to do.  I know I shouldn't see her Thursday.  I'll just be making it worse for her in the end if I drag this out.  I really, really don't want to hurt her and I deeply regret going home with her last weekend--or at least not making it clear this was just a hookup.  

How do I let her down as easily and as gently as a guy possibly can?  She's really nice and she deserves that much at least.  The old me would hook up with her again on Thursday and then block her calls and never see her again.  I don't want to be that person anymore.  He's a piece of shit.  

I feel awful because I specifically told her this wasn't just a fling.  I wasn't lying to get in her pants.  In the heat of the moment I was serious.  Now that I've cooled off, though...
<bot>: Slept with a girl, told her it wasn't a fling.  Had a change of heart.  Don't want to hurt her.