My SO (has been for almost 5 years) is suffering from depression for a long time. I have relapsed into depression a couple years back. We try to keep it together. Me specifically.

There are times when things just seem to collapse. Usually around the same time of the month, i'm sure you know what i mean. This is that exact day. She is saying she wants to break up. I know better than to suggest that this is her PMS talking but i'm running out of ideas. She is adamant that this isnt working, that i'm not the one for her and vice versa. Thing is, this is the exact same argument we keep having just about every month. A few days later, all is well. But she doesn't want to wait. She doesn't want to consider that things are not always this bad. She wants it to end, right here and now.

I've been especially stressed (anxious, sad, tired, etc) for some days now and i'm not sure i can hold it together this time. We live together so even giving it time means splitting up and that's a line that once we've been through, it'll be hard to come back from.

I don't know what to do. I don't know what to tell her. I should be going home right now but i'm clueless as to what i should say / act / do. Please help.