To: I’m writing a song for my ex woman,
Me: you are writing a song for your “ex woman” which suggests to me that she has moved on and you are no longer in her life.
When a woman moves on, she won’t be coming back and you won’t be able to get her back, no matter what you try to do.
You have to accept you had your chance and you blew it and there won’t be any second chances with her.
If whatever you did to her, had anything to do with your incarceration, then she will know what you were capable of before and well, a Leopard can’t change its spots and neither can you.
Better to start again with another female, who does not know your past (there are plenty of female fishes in the sea) and put your past with your ex woman, behind you, where it should be left, along with whatever caused the rift in the first place, which made you her “ex man”.
Your song does not make much sense to me, but then I am not you and I don’t have your background to work with, so I can’t really help you there – sorry – so as above – pointing up!!