It is probably correct to say that most heterosexual CIS women would not prefer a partner who is MTF or a cross dresser. I have no data to support that but it seems to be correct.
It is a different matter completely to say this should not be the case. It would be nice if acceptance is the case, or specifically, in any one specific case that involves a MTF or cross dresser and the partner.
If you can achieve a lasting breakthrough, a truly accepting relationship with crossdressing or as a MTF, that would be great for you.
This sounds as if mutual counseling may be helpful. However she may not wish it.
I wish you the best result of all of this. Maybe there can be an effective solution.