I am pretty new at this but I'm going to make an attempt ...
No, I do not think he rejected you for her......she is only validating his addicion and therefore he will feel no guilt towards her as he would with you. Misery is feeding on misery.
He rejected you because you are everything he wishes he could have or he could be. He probably envies you and your dependability.
They are ticking time bombs.
If he glared at you when you made that statement to him, the truth hurts.
I'm sorry your tired and this is occupying valuable space in your head.
Keep moving forward!