Add jacking off and you got a combo for either sadness or the blank state you're at. Get the fuck out of your comfort zone. Short time span of a couple of months is enough to turn this thing around. There's no better place to start than to hang out with someone and tag along straight to the gym or any kind of workout. There's a reason why this generic working out works. Notice how the depression/sadness/anger/selfpity/blank whateverthefuck people do EXACTLY these things you've mentioned. You're a dopamine fiend and suddenly reached the point where this thing is not enough. Like a tolerance. I bet my cookie box you don't even enjoy these things anymore. It's basic brain chemistry.
Step out of your comfort zone and work on long term stuff. You'll fight your own damn brain during this perion, especially starting with it. You've trained it or yourself if you prefer with all these instant gratifications, basically screwing yourself up without even noticing it. Most do.
I'll suggest you to distract yourself with a job, it will give you less time to donkey around with pointless bullshit. As someone who played games daily excessively and skipped weeks of school for it, I've found out how much of a robot I am while playing some games I thought were my favorite. Turned out I don't like 90% of it anymore. Pokemon games are such a repetitive drag now. In fact I dare saying I understand the formula of games and how they get you hooked. Second and this one is quite big and sometimes notoriously hard depending on a person - NoFap 3 months reset. It's quite alright to fail multiple times and yo the feeling is no bullshit. It's a wake up slap to the blank state. Of course the last one is training. There are a couple or really good dudes with quality videos on these matters, quite inspiring. Lots to learn for even experienced people in the area. Here's one with straight to the point and no bullshit https://www.youtube.com/channel/UC9459CRFjiCq52yKuiraD4w
Right, I spewed my mind above. Lemme tell you that I felt quite close to what you described until the end of this January. Now I'm feeling like I'm kicking ass and loving it, didn't even think it's possible. Reasonably obviously it was/is but damn it's tough once your thoughts start spinning.
Wish you well, do something for yourself and start growing. Digital trash is making you rot bro.