I detect a hint of panic and feel like you're overcooking this.
Rhyme: she's establishing a pattern along which you can spend time together.
Reason: you helped her out with Linux and she reciprocated with some friend time. That is mutually valuable whether you realize it or not.
Next time you're hanging out go get burgers or something. Don't treat human relationships like computer systems, they don't work the same and the sooner you figure this out the better all your relationships romantic or otherwise will be.