>>82320758 (OP)
Tolerating you is easier than having the hard discussion and breaking things off.
Not even just a foid thing, this is a human being thing.
The foid angle of it though is that she's not accountable or human enough to do the hard thing.
She would rather you both keep suffering than endure a little minor present tension. She's protecting herself from consequences.
When it inevitably blows up it will be your fault no matter what, and you will be the bad guy in ever version of the story.
So what can you do? Break it off yourself. On your own terms.
You already know what's happening. It's over.
Don't drag it out. Do right by yourself, do right by her, and take that relationship 'round back like Old Yeller.