I read most of your stuff and Steve and LH are giving you good advice.
I want to caution you - you need to work on your detachment. I told myself everyday for 1.5 years or so that this could be the last day I am married. You really need to stay cool, who knows why she is teaching you Spanish or being nice.
Be strong mentally and emotionally and commit to your personal growth. You really need to reinvent yourself in this process, not simply wait it out to see if she's serious.
H 34 W 29 BD 3/12/18 Divorce Busted Spring 19
It is not things that bother us, but the stories we tell ourselves about things.