Personally I don't like passive aggressive, it's not how I like to operate (and I got my fair share of it from my last relationship).

I'd respond, as not responding can be construed as pouting, or just rude (really who doesn't get texts these days). I'd tell her that you feel it is a gross injustice to the two of you, and your love for each other, to continue with things as they are. You want her to explore the relationship she's currently in without providing any interference, and you're also on a quest to be the best version of yourself you can be - and for now the only clear way of doing that is for the two of you to do your own thing, apart.

If that's TRULY what you feel you need to do go for it. Authenticity is the ultimate, all the other stuff is just games and not being true to who you are. Most guys on this board are man-children mentally, that's why they get pulled off centre by women so much, they don't know who they are and therefore can't be blamed for being anything but inauthentic using techniques and routines like town jesters in hopes that some woman will fall for him (couldn't be HIM, must have been the techniques/routines, right?). These same guys will tell you to "freeze her out" or use some sort of a canned line on her to hit at her insecurities, but really don't we want to just be better people? How true are we being to self-improvement by being inauthentic with ourselves, and with the world around us?

Just be you, you've got this. You've already made your decisions, you're the decision maker, take back control of your life and shape it the way you want to. She's currently not in your game plan to becoming a better you. Don't settle for anything less than what you feel you deserve, and don't make a bigger deal about this than it is or i'll be forced to use even more cliches.