Oh goodness yes! Even non-depressed people do this all the time, right? Often it's just not helpful at that moment, and with that person, to get into it all.
It's not necessarily faking. It's saying "not now". At least, I'm sticking with that.
Although a couple of months ago someone asked how my week had been and I simply couldn't pretend otherwise. But I didn't want to unload on them. So I said, "Rather awful actually, but I don't want to dwell."
Don't mind me. I'm just rambling again as per my tag line.
Hugs, everyone.