I didn't read all the details (yet), but as a friend of mine once put it, "If they ever truly come out with artificial intelligence that could pass a Touring test, it would have to be male. Because women make no frigging sense."
So with that, I have to offer you words of advice about the long view of these affairs... and maybe that will help. If you have to work to hard at it, it's not worth the bother. Unless you want to spend endless days agonizing yourself over how to prop up a relationship that's bound to fall apart on its own. Sometimes you just have to let it hold itself together on its own -- that's your test of whether it's worth your energy or not.
Because the fact is, if a girl is going to walk away anyway -- why not let her do so now while you still have many of your vital organs in tact. She'll respect you more for that in the end anyway.