Honestly, by now, I'm sure that the only reason the Newt and Tina ever told each other how they felt is because of Queenie. And maybe she has to stand there reading each other's minds and by like a translator.
Pfft. He would come hme looking like that anyway with a huge grin like, "I got stuck in the middle of an Erumpent stampede but it's alright I managed to calm them down and then delivered for the pregnent mother that started the stampede. How was your day?"