"Things can't be bad all
the time, its statistically impossible."
Everyone, all people seek contentment, however; our methods are random pickings. We don't know the best way to obtain it and when we do get lucky it fades fast and doesn't stay.
What am I getting at?
Self identify with her your own struggle so that she knows she's not a lone. We all feel like her, shes not unique. She hasn't been unlucky, we ALL have this problem.
So how come we all are not suicidal then? Because we are a little optimistic because we have seen there are ways out that don't involve killing ourselves.
Depression is a cyclic mindset that feeds itself. If you wallow in your ideas that spark it, it will continue endlessly. The only way to end it is by changing this mindset. It might sound daunting or even insultingly simplistic but it's just this very premise that one needs to hear.
If our desires are too many or too far out of reach we will ultimately give up pursing them. What ever they are we will begin to feel hopeless of ever being happy or content.
Here is the trick. If you are already set in death, then what do you have to lose by trying this? You have tossed in the towel so why not give this a try?
Search your mind for what you are desperately wanting, needing, lacking that you think is necessary to fulfill you back to happiness. What ever they are, or how many they are. Bring them all into your mind. Then destroy them one by one as ever leading to happiness.
"If I had X, I would be happy."
"If I had x, it can not bring me happiness."
This needs to be realized. Its the starting point to break the cyclic spark that creates depression. All you have to do is destroy this thought that obtaining what ever it was, will not infact make you happy.
This is to remove the burden you are placing on yourself. It needs to be consciously thought, it doesn't need to be believed. Just thought. Pull them all out and destroy each thought one by one.
I know it sounds ridiculously simplistic and intellectually insulting but this will extinguish the spark of depression.