It sounds like a lot of your depression is situational, related to your job/living situation. However, as you stated, that is not going to change for awhile, so you need to do something to deal with it in the meantime.
You seem pretty against going the med route. I'm not sure what you took before that messed you up so bad or how long ago it was, but there are many new options out there now for dealing with depression. I think it may be worthwhile to at least talk to a psychitirst to look at options and possible side effects. Just remember, you are in charge. You dont' have to take anything you don't want to, and if you don't want to go at all, that's ok too.
You said you had learned some "tools" from therapy. Are you using any of them? If not, you may want to go back to your theripist to "brush up" on them and possibly learn some new ones. Use some of the advice you get here, other than "call your sponsor" of course!! If you haven't checked out Lifering or SMART web sites, you might want to do that as well. They have some good "toolbox" items there that can be a big help.
It's great that you are doing the exercise, I wish I could say the same for myself!! I know it can be a great help for depression, but I always am able to find the time for other things first!! I too struggle with depression, badly for the last several years. It was also largely "situational" due to my job/living situation. After my divorce, I fell very hard. I had to move back home with my parrents, it took months to find a job, and the one I ended up with sucked what was left of my soul right out of me. I was a 1000 miles away from my young son, and missing out on watching him grow up. Pot was my DOC and I smoked it 24/7, just to deal with life. I was almost 40 years old, living with my parents, working a $hit job, with no prospects of getting out. Of course one of the reasons I couldn't get out was my substance abuse, it was a double edged sword. On the one hand it helped me deal, but at the same time it kept me stuck.
About 4 months ago my folks decided to move. Fortunatly for me, they moved to within a 2 hour drive from my son. That has help me tremendously. I also quit smoking the pot when we moved. It was hard at first, but so worth it now. This is the longest time I have gone without smoking in over 20 years. It took me 3 months to find a new job, and I gotta say, it was really wearing on me. Those old depressive thoughts started making their way back into my life again. I ended up seeing a new doctor and theripist and it has been a great help for me. The new doc took me off of all the meds I had been taking, listened to me about what had worked in the past, and went with that. My old doctor really wasn't like that, but at the same time, I was smoking all the time, so it's hard to blame him for a incorrect diagnosis. My new theripist is wonderful. We have only been able to meet a handful of times, but she has helped so much in those sessions, I can't say enough good about her.
I hope you find some of this helpful, or at least relateable. The worst thing you can do is to just stay stuck. I've found it only ever seems to get worse. I don't think you can afford to wait until your situation changes next year to do something. So that is my advice, do something different. While you are doing many positive things, exercise, keeping in touch with friends, etc., it seems to not be working overall. So learn some new coping skills, and use them. Try the theripy thing again. Talk to a doctor and at least get their opinion on what is going on with you. (If you do this, I would highly recomend a psychitrist with a speciality in substance abuse. Most of them have a pretty good grasp on depression, but not all have experience in substance abuse.) Just try to do something to get out of this rut.
I just noticed your location "far away from the ocean". That sucks. That was one of my issues too. I spent the last 4 years in land locked Illinois. The ocean is a very "spiritual" place for me, and I don't consider myself to be a very spiritual person, in general. I am now back in the coastal Carolinias again, and that has been a big help for me. I hope you can get back to the ocean as well.
Welcome to the Secular Connectins forum, hope you can find something to help you here. Take care.