He answered in such an offhand manner that I wondered if he’d misheard me.

他如此满在乎的回答教我怀疑他是是听错了我的话。

I am hearkening...... I doing feelingly for sure, but I doing put a bold face on sth.Pretending.

我在楼上听着…… 明明是很感，却要装作心理满在乎。