I had pretty bad depression for my whole 3rd year as an undergrad, and the only thing that has helped me is making changes when things weren't working.
The hard part is that you don't want to make any changes, you just want to be sad (at least I did).
What I did was lighten my course load and try to do some stuff for fun. This meant doing more development for fun, seeing friends more often, having more new experiences, more exercise.
It's not easy, but it's worth it. Give it time, and on the really bad days, just know you're not alone and it gets better.
The hard part is that you don't want to make any changes, you just want to be sad (at least I did).
What I did was lighten my course load and try to do some stuff for fun. This meant doing more development for fun, seeing friends more often, having more new experiences, more exercise.
It's not easy, but it's worth it. Give it time, and on the really bad days, just know you're not alone and it gets better.