>>82115065 (OP)
if you're mostly playing singleplayer, time to get the niggas together and find some shit to play. even bland ass cod is fun when it's you and a few friends. better suggestions would be shit like destiny with pve raids, or raft with building mechanics and co-op.
if you're playing multiplayer with or without friends, it's a bit more complicated. step away from it for a little while, maybe take a break for a week or so and play something totally different on your own time.
on a macro scale, look at what you're doing right now. are you employed and making decent money? if so, maybe now is the time to spend a little on experiences. i am tighter than the bark to a tree, but i've been doing a bit of that lately since it allows me to not feel like i'm basically a dead man walking through existence. pick up a relatively inexpensive hobby, even. just *do something*. anything that you have even a vague interest in, try to get into it if you can afford it.
are you not employed, but still stable (neeting)? unironically, get a job. no longer finding enjoyment in things you used to like is your brain and body telling you to be productive, it's as much a human need as food or water.
how about sunlight? go outside. my time on nights has taught me that sunlight is very much not optional. when you get direct sun for maybe 5 minutes a day, you start getting depressed very fast.