What are you going to do, if you fall in love with a girl, and, later, she, unexpectedly, is coming out to you as transgender woman(M >> F)?

Stealth transgender woman means, she transitioned and pretend she already was born in the girl body, raised as girl, and never transitioned. By definition and by default, she does not tell other people her full journey: to employers, and, in a lot of cases, even for friends. It probably means, you can hide fact of her trans-status from your relatives (if they're used to being not tolerant).

Please imagine a case, when you met with a girl, which you're really like - maybe in a case when you initially were just friends with a common hobby. Or maybe you're former colleagues. Or other cases. But later you're both start to feel a chemistry. You tried to convert this friendship in something bigger, but she avoids. Because you fall in love, you can't just ignore this situation, and you demand an answer why she ignores all your attempts, despite you feel, she is also feeling to you something, and you know, she is single.

This is question for cisgender straight/bisexual men. If you're transadmirer/chaser, it's probably not a question for you, but you can also answer (please mention this).

If you don't mind, please also tell, what if she is not stealth, but opposite: she is open transgender - everybody knows she transitioned, only you missed this, and in another case nobody knows, even her friends, only her parents knows.

Also, she could have a bottom surgery or don't have - can it change way how you're going to act?

Please tell a bit about yourself when you answer.

For mods: Please do not delete my question, I'm not TERF aka GC, I'm transgender woman myself, and I'm just curious.

UPDATE: I see, not everyone consider same scenario, as me. A lot of guys expect, it is a case of dating, not a friendship. This is, in the comment, more detail scenario. Please mean it.