Hey Surrounded,
The thing is, he MIGHT be IN THAT MOMENT of writing you love notes be washing around in a syrupy wave of sentiment. In other words, he might IN THAT MOMENT be experiencing his version of sincerity.
But he's an N. And an abuser. And what this ultimately means to you and your life is to face the sad fact that these gestures, "sweet" as they seem, don't have any meaning.
They are just words. It is his actions, over time, and how he has made you feel, over time, that are the reality.
I think you can judge what the reality is. Don't let "notes" or "words of love" confuse you.
Have you FELT loved? Supported? Respected? Encouraged? Etc, etc? Answer those questions, listen to your inner self. He may himself honestly think he's having real lasting feelings when he does this little win-you-back campaign. Unfortunately, Ns are incapable of appreciating their own limits.
You need to keep Surrounding Yourself -- with strength, self-love and determination that you deserve a real life, real freedom, not too-little-too-late manipulative "note bombs."
Don't fall for it. I think these are the empty gestures of a cruel campaign. He's just testing, I believe, to see if the change in you that he can sense, is real.
Show him it is. Don't fall apart because he came up with some treacly sentiments.
Just my opinion, but I think you've been through enough already.
Hopalong