

It’s not a perfect solution but something that I do, is anything that requires my full attention and prevents me from thinking about them.
I too am currently having this problem because I can get easily attached to fictional characters. I’ve been playing Honkai Impact 3rd, which is my first time playing a Mihoyoverse game, and the story (at least part 1, I’m not in part 1.5 or 2 yet) is so tragic, that I’ve developed an attachment to the characters. I’ve been trying to take breaks from playing, so I can focus on other things, but I get depressed if I go too long without playing it.
There are a lot of things that make me happy to at least some degree. Just going in order of what I remember, there is, finding uses for older pieces of technology, listening to music that is upbeat and “energetic” (if that’s the right word to use), playing games with good gameplay and stories (even if they can get depressing sometimes), and while it’s been a while since I’ve last watching one, watching Anime can also make me happy. There are also some other things but I’ve either forgotten them or I just don’t feel like mentioning them.