Good stuff Stan!
This line:
"I managed to get her jealous somehow"
...seems to indicate you don't know the reason, yet here you say:
"I told her The Truth..& she DID Set Me Free"

This line is weak for you:
"Her Leaving Me Isn't Fair"

This line: "I Wish You'd Give Me Just One Sign"
...feels like a set-up that you don't complete later.

"I've not got ONE Secret I've ever Held-Back
SOME Secrets I'd never tell Anyone Else.
We shared Our Secrets with each other..
I don't like that you used "secret(s) 3 times here.

I don't feel the last verse is up to the standard of the rest.

For this to work as a song, the lyric needs to be super-passionate. We need to feel the singers desperation.
Best of luck Stan!
-Mike