I think being okay is best defined as having faith in your ability to make it to the other side. Nothing lasts forever and nothing stays the same, so the goal becomes not 'happily ever after' but 'happy for as long as possible, sad for as little as possible'. It's the knowledge that you've survived every single one of the worst days of your life, and that you will continue to survive them. It is approaching another dip in the road not with the idea that it's going to suck, but the idea that it's going to pass. Sure, you might have to work to get out of the rut, but you've done it before and you can do it again.

I firmly believe that I'm capable of climbing out of my depressive slumps; so, I'm okay.