He didn't know, really.

Freminet didn't know what the Fatui had done to you. Had you told him, he would've tried his best to be transparent with you. Or at least, that's how he hoped he would've been. He doesn't know anymore. He's just so scared of losing someone so close to him because he's associated with the ones who traumatized you... The Fatui.

But you'll understand. Right? You always have.... Please understand. He'll beg you on his knees if he has to.