I think you should ask yourself what is really important to you. Is this girl so much your soul mate in your head that you are willing to continue to go through this turmoil? Probably not.
So, what is the solution to the turmoil? Couples therapy where you are both ready and willing. If one or both of you is not ready or not willing, it's not going to work.
You probably also need to realize that you should address the (to me) obvious reality that she is using you. This is a woman that is afraid of relationships, maybe because of her experiences in past ones, but she wants stability (i.e. , someone like you).
Of course, stability is not what she is used to, and so she isn't going to treat relationships in a stable manner. But she keeps coming back to you, because deep down she is aware that stability is not only what she wants, but needs. She probably also realizes that someone who wants monogamy and is stable will be a very good father figure for her child.
She is using you to have ... more.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.