As a young person I can only speak from the experience of someone who is currently recovering from mental health issues with the help of loved ones. I'm not sure if you've sought out professional support for your issues, but if you think you might have depression you might want to try to access mental health services in your country. I don't know how well provided the public/private health system is where you live though.
But one thing I can definitely say is that you should talk to your wife about your issues(maybe you have already). From your description it seems like she is an extremely loyal and caring person who loves you, and spending quality time with her might help you cope with your circumstances. If you feel like every day has become the same due to your routine and your low mood, maybe you could start talking to her about new activities you can do together, new hobbies to pursue together, new places you can visit together, or just talk and reminisce about the life you've spent with each other. What people always say to depressed folks is 'count your blessings,' but it's hard to do that without actually experiencing and understanding what your blessings bring you and mean to you. Spending time with my parents and realising together what our connection means to us is one of the main things that is helping me in my recovery. You and I, we're really lucky to have people who love us and care about us enough to help us get through the bullshit we're facing in life.
