A mate of mine was in exactly the same position a few years ago. He ditched her and is now an A320 skipper and beating off women with a ****ty stick.
You'll soon forget her when you've done your first solo, picking up your blue book, earning your green book, putting on your fanny magnet or setting cruise at FL360 etc etc etc etc.
My missus would be more annoyed with you than your possibly soon to be ex because she hates women like that who treat their men like wusses and are only interested in them selves and then let them away with it.
I told my wife from day one that i wanted to be a pilot and dont even think about trying to stop me.......in fact the opposite was true in that i wouldnt be flying now without her.
So in summary and without trying to be too flippant with your dilemma ditch her and book the first ticket you can to SA get your licence and get the life you want.
Good luck with your decision but i think you've made it already and just need to hear it from your piers