If you choose to stay, I'll wait....

Theia

Sirens.
I get this line:
"Every choice/mistake I've made is not my plan
To send you to the arms of another man"

This one is odd to me:
"and if you choose to stay I'll wait, I'll understand"

If someone leaves you for another person, I mean really leaves you, they don't generally want to come back to you.
Right? The lyric, to me, presumes that the woman feels like she might have to stay in this other relationship and when it's over he'll be waiting in the wings. Isn't that presumptuous of the writer to assume she still wants him?

What do you think?

whispering hands

I think the protagonist is trying to convey that he realizes that he pushed the muse to leave, and he thus understands their feeling of that need to see if this new direction is the right one. That he still loves that person, but knows he fucked up.. The I'll wait, part I think is a voicing of maybe backing off and letting them see what the direction they truly want makes itself known; forever hoping in the back if his kind that it's still him.

Just my take on it.