Defensive or Depressed?

I am in a really defensive mood this morning and not a particularly happy one at that.  Once again I am feeling as though no one really understands what it is I go through and what I can cope with (and what I can't).  It's not a particularly nice feeling.

Then I think I'm not really being defensive, it's my depression thats making me think/feel/act like this.

But then a part of me recognises that I did bring a lot of this onto myself however inadvertantly.

And then another part of me considers that maybe all of this is just an excuse and it's not related to my depression at all but just to who I am.

Finally the final part of me thinks "fuck this" and I'm off to eat some lunch.  I'm going to listen to that part of me.