Sadb,
I'd say that if you're looking for help and support with this, you came to a very good place to get just that. I'm currently on my journey with this as well, and I have had success in the past but have relapsed. I know that you said in your post porn was one of the things that you had to get you through that depression. What is seems like though is that porn may have infact been contributing to that depression as well and that is something that you wanted to change - I imagine that's a main reason why you're on this website. I think there is a lot of taboo behind these two things, but I swear by meditation and journaling. I have a lot of negative feelings, but used to have far more in the past. Journaling is just something that I do on my computer to get my thoughts out into a word document that I have saved, and I just write about whatever I'm feeling usually on a daily basis. But if I really feel sad or the strong desire to watch porn, I go on to my document and write to get those thoughts out of my head. They may still linger and be things that I think about, but for me it's important to find SOME way that I can deal with them. Meditation is something that is really really easy to get into it - it's just about bringing yourself to do it. There's a great introductor app anyone can download called "Headspace" that can start out just with quick little 10 minute guided meditations.
I don't know what's leading toward the negative feelings that you may be having, but I know for me that using porn as an outlet makes me feel better for the exact time I use it, then worse right after. I don't know if it's the same for you, but I know what that means for me is I then need SOMETHING ELSE to do when I feel those feelings. It's hard to start that other activity, because watching porn may be so hard-wired into one's brain if that's what they're resorted to when stressed, sad, angry, etc. For me, journaling and meditation are two of those other activities I go to. Many other people say working out as well, but to me that just doesn't help me sit with and make sense of the feelings I have going on in that moment. Nonetheless, try different things and see what works well for you, but the trick is just doing SOMETHING when all you want to do is watch porn - just don't let it be pulling up one of those sites or pics on your phone.
Hope this helps man - you have support here. Even people aren't commenting on posts, don't get discouraged. You being on here and a member on this site shows you're part of the community here, and that in and of itself is supportive enough. Props to you for trying to make a change - keep up the grueling, hard work. As someone who has had success in the past and is determined to get back there, it is worth the pain you have now. I'm feeling it too in my own way. Stay strong man!