Oh Yael... š The silent treatment is one of the cruellest things anyone can do. Especially to someone who is anxious attached.
I've been on the receiving end of this (not romantic but familial and friends) and it is the WORST. It's like they want to make you feel like you don't exist. That you're beneath contempt. And you wonder - why? What did I do that was so awful?
It's the biggest mind fuck. I'm so sorry you're going through it.