cissoids always see you as your agab. period. even if you overcome your brainworms, start passing, get srs, ffs, vfs and accept yourself as a woman, your girlfriend would always see you as a woman.
this is an inherent biological truth that applies to all cissoids. even if they haven't seen lion in their entire lives, monkeys instinctively know to fear and run away from them. in the same way, cis women insinctively see trans women as "men". just the knowledge that you were born as a male is enough for her to not see and accept you the way you desperately want.
t4t is the only way. tranners are the only ones who actually understand how life ruining dysphoria is and how we would all be so happy and at peace if we were just born in the body we were meant to have. it's not actual lesbianism obviously, we're not real women. but it's the best possible option.