Underwhelmed / empty, whether school or vacation?

I have been feeling "useless" for about 1 1/2, I'm not coping with anything ((at the beginning it was not so strong, probably because it was only so short) but also the school changed to 10 (did not have some topics that came up at work) and learning is the last thing I do voluntarily), but I just don't feel completely as if something is missing. Before the said period, I have been playing games since 2014, which means about 5-6 hours a day, weekends sometimes longer, and from about mid-2017 I had a girl whom I still think is special. (Meanwhile 0.000 Since then I don't feel that "completely" anything is missing, nothing is really fun anymore, in between there are Netflix series or YouTube videos, but 7-8 / 10 I'm bored and gamble only because I have nothing else to do. Learn, every now and then, but Corona has postponed the exams until now (BW) by about 1 month. That means I now have 6-7 weeks in which I do nothing…

Btw. I can't really pursue my hobby because of Corona…

In addition, there's the ban on contact, and that one of my best distances itself from me, and sometimes ignores the news from me.

Do you have any ideas or anything else like how I could kill time without feeling every single day as if it was 48h?

Can you explain physics to me?

Learn an instrument, draw something, play a card game (Yugioh, UN, etc.), write a story. As you can see, there are a number of options.