This may seem like like an odd suggestion, but it helped me a lot when I was going through some tough periods in my life. I took a break from guitar, and I started working out. I spent a lot of time outside running. I wasn't good at first, but I kept going. I got a new energy from life. Even if you can't run at first, walking, jogging, lifting weights, something like that helped me. Depression is something you're going to fight, but you can fight it. But it's not something you can necessarily do alone. This is one thing in your life worth seeking real help. I've watched several family members struggle for years before finding the right treatment. You can do this, don't give up on potential treatments.