Mocking my depression

So, I have been trying to take control of my depression, learning about triggers, about how parts of my diet set me off so I can avoid those foods (it's foods I liked of course), getting out and walking the dog, gardening and just trying to be positive. Sometimes winning, sometimes losing. But trying.
Then my not girlfriend who has dumped me again posts a thing on Facebook saying you know who and mocking my depression.
I apologise for my depression and for not being what she needed and so she gets shitty with me. She toned it down a bit later.
I don't know. I just don't know. You try to lift yourself up but there are always people trying to drag you back down.