In general, women are characterized by intuition and can easily understand when a lie is in the air. However, this does not exclude the possibility of a professional manipulator lying and throwing her away. How to figure it out before it's too late?
Avoiding any mistakes is not a good sign.
"Have I ever lied to you?" Sorry, but this is the typical phrase of a man who is lying.
Notice if you can see it when you speak.
The eyes are legible. A man who is lying is very easy to detect through the eyes.
Change in behavior. Be watchful!
Of course this is somewhat difficult to discern. But if you notice any change in his behavior and you don't know the reason, you should probably start doubting.
To blame you
The best defense is attack and we haven't said that. He tries to throw you away to blame himself.