Cool to see that you've begun applying self-forgiveness on this point that you're facing. I have also been walking through depression, and have in this found some supportive techniques and tools that you're able to utilize to bring yourself out of the abyss.
Depression is one of those patterns that we feed and create through our physical living behavior. What I mean by this is that, depression is something we live and act out through for example: Slouched shoulders, being uninterested and demotivated, not caring about what is going on around us, not paying attention to life, and being generally apathetic towards opportunities for expansion and self-creation. Thus, through us remaining in this physical zombie-state – we're affirming for ourselves that we're depressed, we're sad, we can't do anything about it, life sucks, etc.
A solution, thus, is to start changing your physical behavior. And see, it's fascinating, you don't have to feel a certain way, in order to change your physical behavior. Usually, what I do when I notice that I am going into a depressive energy, is that I go to my computer, put on some music, and dance – this helps with grounding myself and shaking that drippy, deep, and saddening depression energy. What I also do, is that I straighten my shoulders, I also practice remaining clear, and specific in my voice, so that I don't drop into a low, mumbling, because that will also fuel this personality/energy of 'depression' – and you want to push yourself out of that energy through physical movement and action.
Now, it's important to remember that you can't solve the depression with only changing your physical behavior, because you will have certain thoughts/back-chat that you participate in throughout your days, that create this depressive experience/energy to begin with – and the depression will as such come back, until you direct the origin-point. Thus, I suggest that you spend some time to write about this depression as well, look at what is creating your experience, what are the underlying thoughts, ideas, and beliefs? And when you find these – forgive yourself for having participated in them – and the next time they emerge within you – move yourself to not participate in them – do not accept and allow yourself to fuel this personality anymore.
Lastly, remember that it's all up to you to direct depression – and we do have the power to do so, but we must give of ourselves, it will take effort, and will-power – and as a reward – we will have magnificent results where we are able to now direct depression and as such never again become depressed.