I miss my old self. This person that I have become is depressed, doesn't have energy, and isn't impressed by anything. I don't find joy in anything nowadays. My productivity has gone down tremendously. I can't even remember the last time I was happy with myself. I don't know where this leads to but I hope it ends soon.
In Sheldon Cooper's voice, "there there." You're going to overcome this. May be you can try recreating your old environment, old habits, or friends.