Hey Pud, just a few things, if I may. I know you want him to understand about your depression. As someone who used to suffer from a deep depression, I know your pain. It is near impossible for anyone to really grasp what it feels like unless they have gone through it.
So, you had this talk. And truthfully, I think you want him to understand a great many things and the thing is, he just cant right now.
However, you said what you wanted to say. He heard it. I dont think you need to say them again anytime in the near future. Let him sit with it all and process what he can.
And Pud, you really do need to forgive yourself. You did the best you could with the knowledge and tools at the time. And to hold onto it stops you from moving forward.