AAAAAAAAAGH IT’S SO FRUSTRATING. Nick wanted to tell Juliette as far back as EPISODE TEN. And he should have!
Like Monroe, I love you. But Juliette is not THE VAST MAJORITY OF HUMANS. She could absolutely have handled it.
I mean, I get it. At this point Monroe is basically a loner hermit who’s half-afraid of his own nature and still getting used to having A Single Friend (of COURSE his first friend in years would be a freaking Grimm too), so he’s extra wary of telling anyone anything.
(And Nick still should have made the decision anyway, but his One Mentor in this new life of his is saying no so I get that too.)
BUT STILL. IT’S SO FRUSTRATING TO WATCH AGAIN.