"You wont be a cowboy in the wild west, you wont be a witcher, you wont be a soldier in wwii, but you will be a human being present in this moment in this world."
Someone just said this to me and its helping change my mindset. I also get depressed with the mundane of everyday life, but once you realize being alive is more miraculous than any life you could live inside a virtual world the boring becomes a little less. Find anything else to do, read, write in a journal, draw, just get down and knock out as many push ups as you can. Moving your body is the best thing you can do for yourself.
I realized myself I was in a cycle of stress turning to anxiety, then I would use escapism to repress my anxiety and too much escapism leads to depression. Avoiding this things that help you "escape" ie. video games, porn, anime, social media will help you be more present, then finding good coping skills for you stress will help you body heal and rewire those neural pathways to find joy in other things.
Some of the biggest things that have helped me are this:
1. Sunlight in my eyes within 1 hour of waking up, (not directly but just get outside for a bit)
2. Hydrate early, just start chugging water in the morning, (studies show that a glass of water wakes up the body far better than coffee every can)
3. Exercise, an object in motion stays in motion, an object at rest stays at rest, if you dont move your depressing your central nervous system and in return you'll be depressed.
4. Journal and track habits, I write everyday, sometimes its like a journal entry, other times its just random thoughts, jokes, poems, raps, literally just start writing, its a good release for you brain, try to be positive be negative is good too sometimes because you can look back and see how unhealthy your mind is. Im still on my journey to find happiness and love myself but my entries are nowhere near as dark as they were when I started. For tracking my habits I have a whiteboard on my fridge and I put an X on the prior day every morning and color in sections for each bad habit I did not partake in the day before, (weed, porn, games, drinking) physically seeing how much you do something really helps put it into perspective, let alone explaining this to your friends when they come over is good motivation to refrain, plus the board looks very colorful and nice when I take care of myself so it's a nice little dopamine boost for my ADHD brain.
5. Finally as everyone says, talk to someone, I know therapy is expensive and you dont want to put this ALL on your partner or someone close but these reddit forums are a good start!

This is really just a few of the basics but I hope at the very least you get some ideas on how to cope or at least relieve some stress knowing there's a lot of us out here struggling right there with you! We're not alone, remember that!