to me it felt like it was one of those signs that Jess is growing out of this relationship, or that the relationship wasn't working for her anymore at least for that time, so it seemed very like....reasonable and understandable a choice for her to be making in the context of what the relationship was, even beyond the "and are you getting treated for mental health yet" part of that kind of disclosure. Is keeping major secrets from your partner a bad idea in relationships? ABSOLUTELY. But people do things that are bad ideas all the time, and in this particular case I felt like it fit what we'd been shown of the character and the relationship, rather than shoehorned in for narrative reasons