Tad, I'm sorry. I know that it hurts to hear she is remarrying.
Here's the thing. You need to change your mindset about a few things.
One being, as Jack said, only we can make ourselves happy.
And you keep reiterating what she has said about you in texts to your son (though I dont understand why you know what was written). You say them as though you still dont understand why she says them.
Really, it's how she feels. Doesnt matter if its true or not. Doesnt matter if you believe them or not. Doesnt matter if she says them again and again.
What matters is this. You need to really believe that you can be happy - with you. You get to choose what kind of life you have. You get to choose how you feel.
You need to really let go of her, Tad. Stop trying to figure it out. She feels what she feels. You know your truth.
