I've been fighting with depression for the last 10 years or so, and an anxiety disorder for about as long - the anxiety attacks were spread out, until around December when they became a weekly thing, sometimes daily. This was down to an emotionally abusive and generally stressful relationship, which I only ended a few days ago.
There was nothing violent about it, or overtly aggressive in the way she treated me, but a great deal of passive aggressive emotional blackmail, designed to hit me in my weak spots and make me susceptible to her requests/demands. It may seem spineless to get stepped on like that, but the way these comments were used was pretty devestating on my already fragile state of mind. I felt like if I did not give her what she needed (often in terms of paying her bills or whatever) that I would be solely responsible for her life going to shit, things like "Well I guess I'll just be homeless/starve/kill myself."
I don't think there was any real malice in the way she behaved, I think she has a whole lot of issues of her own and I have tried to get her help, and will continue to do so whenever she feels like speaking to me again. I'm not going to leave her up the river, but I am absolutely done with trying to make such a toxic relationship work.
I went without my therapist for a year or two, shortly before I started my relationship, and when things started to turn sour I lacked the inclination to return and open up. I'll be booking an appointment with her next week. I continued to get my medication, and even started getting treatment for my anxiety attacks since they have ramped up over time.
Keeping to myself, though, that was a big mistake. That's what made things get worse and made me get seriously sick. Keeping these things to yourself is never the wisest solution, you should never assume the professionals you have turned to are going to screw you over.
And what they did to Kate wasn't even close to the betrayal of trust she seems to be making it out to be; it may have been distressing for her but a little perspective, through hindsight, should show that this was the best reaction to her situation. Everyone else seems to have their heads screwed on, so I'm not fretting over anyone taking her anecodte with any seriousness.
I wish everyone here living with their depression the very best. Get the professional help you need, and also take comfort in strong support networks, either from your family or friends (both in real life, or places like this).