Same main advice I always give here for those who are feeling listless:
Drink water. A lot of water. Most people are dehydrated, whether they realize it or not. And dehydration has a ton of negative effects... it hits you in many places all at once, and two of those places are mood, and energy. You'll have quite a lower mood, and much less energy, when you're dehydrated, which you probably are. Water has only positive effects, there's little reason NOT to drink it... it can only help you. But you have to keep at it. It's not the sort of thing where you do it once or twice and BAM that's a cure. Doesnt work that way. Gotta get onto a proper regimen with this, and it's not easy to do. You need to make sure you're getting enough of it, it'll take probably a couple of weeks before the positive effect begins (because your body isnt used to processing that much of it due to the constant dehydration) and until that starts, you'll have to use the bathroom about a bazillion times a day. It's very worth doing though.
Do you drink alcohol? If so, dump it. ALL OF IT. Unlike water it literally has ONLY negative effects. It will worsen your depression, make you feel more listless, lower your energy, among other unpleasant things it does. Yes, I know society says that alcohol is a big deal and you're supposed to do it, but society is also dumber than a sack of hammers.
DEFINITELY get another hobby. It sounds like you've fallen into the exact same problem I went through, which is being stuck in a rut. Dont get me wrong, video games are fine, they're my primary hobby. But you need VARIETY. In my case, while it was initially difficult to get motivated to try something new, certain family members sorta pushed me to do it regardless, and... yeah, it worked. There's a ton of really amazing hobbies out there, and for most of them, the rabbit hole is way deeper than you might initially think. I dove into board games for instance, and discovered that solo play is a big thing now (perfect for me), there's a huge community with reviews and videos and guides and such, and incredibly creative ideas being made by incredibly creative people. AND, it has a great tactile element. Considering that I used to think of board games as basically "roll dice and move like in Monopoly", well... yeah, that rabbit hole really is DEEP. And that's how hobbies are. You arent going to see how interesting and deep one really is, until you take the time to truly explore it a bit. Fortunately, the resources are out there, particularly on Youtube. Seriously though, being stuck in a rut like that is one of the worst things that can happen for your mood and such. Particularly for those of us on the spectrum. Even if you have to outright force yourself, look into stuff to try out.
Lastly: Dont sit and watch stuff too often. Definitely lower how much of that you do. Why? Because you need things that actually engage your mind properly... watching stuff wont do that, no matter how interesting it may be. It is not providing any actual mental challenge, no need to think about situations and make decisions, and so on. A lot of people out there will just sit like slugs in front of their TV all the bloody time, and then wonder why the heck they feel like everything is dull. Well, that's why.
Seriously, I went through exactly what you describe, and this is what worked for me and really turned things around. Give it a try! All of it! It aint easy, definitely not. But it's worth doing.
