Depression and creativity?

I dont think there are factors which determine or not whether your meant to be an artist. Maybe your depressed because your artwork isn't very popular- or you have run out of ideas? Never be put off by these kinds of things. Some of the greatest artists in the past were some of the most depressed artists alive, as you said. I am not suggesting you need to be depressed to be a great artist- maybe just try and accept life and take what it throws at you happily. Take opportunities and meet new people. There is no need to engage with a battle within yourself- a 'fight' as you phrase it. Just accept yourself and get out more, and you will fight it without realising.