Yeah well that’s the hard thing about romantic relationships I guess, in a way it is always personal, because it is (usually) a life together - humans need regular meaningful contact with other humans to keep them happy. This is one reason why fly in fly out workers may have strained relationships. But that’s just physical distance; emotional distance is sort of like rejection (not necessarily intentional though)..
The talking to her about your problems I get from both sides - depending on how many people she tells and how much she tells it may be understandable or it may be a bit insensitive to your sense of privacy... As I don’t know much about it I won’t say anymore.
Its still great she’s staying with you when you haven’t seen her for four months - that’s a long time. Do you communicate much with her otherwise- eg text/phone/video call?
Medication might be good. It’s definitely not a cure by itself and everyone responds differently, but combined with working on yourself in other ways could be helpful. To disclose my own experience, I first went on antidepressants about ... 2010, took them for four years, stopped for one or two I can’t remember, and have been on them for the most part of the last 6-7 years with a short break halfway... Interventions tend to work best when you combine them, eg. Medication and psychotherapy, taking care of yourself.
Unfortunately your last psychologist told you to breathe and meditate - which are great things, but without addressing underlying issues is like trying to put a bandaid on a broken bone...
But don’t think you have to go and do everything at once. Maybe medication calms you just enough to work on taking care of yourself and spending some time with your girlfriend, and then some therapy, if you get a better therapist this time, helps a little bit too...
just ideas my friend, hoping that something useful comes out of my mind to grab onto- like sleepy, I’m not here to preach but try and help people suffer a little less