I know how it feels to be sad/down/depresed for a prolonged period of time and sometimes no matter what you do it won't go away, I know it's not as easy as it sounds but I think it would help you to maybe keep a journal or find something to be positive, happy, and excited about in your life, something to look forward to or a passion to talk about
sometimes it could be good to get help elsewhere as well if you feel you want or need it, or make a change to your daily habits
you post a lot here about how you feel so I'm guessing this is your escape from irl, I think the mental health thread would be a good place and outlet to talk about this stuff c: hope you feel better soon