I have met two people who had depresion and overcame it, and both had something in common. they set themselves a goal to overcame it and do the full proccess.
You may not have realized it, but i think you are stronger than what you believe. Even in your moments of grief, you revive a topic spreading positivity(the one you created in the first place), and this helps a lot of people, you gave a lot of people a reason to smile and feel good about themselves.
Being strong is not about never falling, being strong is about getting up when you fall. And i know you can do it.
I hope the therapy works for you, You make a great difference here for the better.
The least i can do was to give back some positivity 