Sheltering in place is hard. Not seeing friends, no team sports, too much time with parents at the exact time when that feeling of wanting to separate from them & branch off into your own life is becoming strong.
Social distance walks 6 feet separated from a friend can help. Even if you have to wear a mask. And there is online time —Kerbel Space Program, other videogames, Magic the Gathering online. And a fair amount of random youtube.