What the actual?

Found out my boyfriend has cheated, messaged him telling him i know and we need to talk later when the kids are in bed. He's came home as if nothings happened, attempting small talk about his day🤔 while I've put the kids to bed he's gone to sleep on the sofa! If that doesn't show how little he cares I don't know what does...

Editing to say that he woke up, got in bed without saying a word. Turned the light off and went to sleep. Just completely ignored me.