Hugs.
I’ll tell you that many people are very ignorant about mental health. They don’t have to have mental health diagnosis to be understanding, they just have to get educated on the matter.
I don't think one needs to be a doctor to understand that one can’t walk on a broken leg so one doesn’t need to be a doctor to understand that one can’t just snap out of depression and anxiety. Unfortunately many don’t want to educate themselves.
It’s not your job to educate them but maybe when they bug you about snapping out of it or your concerns aren’t real, you could tell them that you have a specific diagnosis and what you feel isn’t a choice and maybe they should read up on it. Well, they might not. But the ball is in their court now.
I am glad to hear you have supportive partner.