[necovek]

First up, everyone is different. Some people can be alone for days without fuss, others feel like you.

I can easily do days without other people, but I would keep myself very busy (hobbies, sports, projects, books...).

If you are unused to it, avoid just passing time doing nothing or watching TV, find a purpose to your alone time.

If you can't, don't sweat it and find a roommate or a partner :)

[the_only_law]

> First up, everyone is different. Some people can be alone for days without fuss, others feel like you.

This is why I generally hate online advice.

1) Not everyone is exactly the same and can copy your mindset/routine/etc. and be fine.

2) Very rarely do internet strangers understand you and your situation intimately enough to give proper advice leading to repeated cliches and other things that end up pissing off a lot of people.

[mesaframe]

The problem is sooner or later I lose the motivation to do anything. It's a feeling of deep dullness.

[necovek]

I think this is the worst time to try to learn how to be alone: pandemic is messing up everyone with lack of social interaction.

At the same time, it might be most critical if you've got no other option, when I suggest you look up some professional help.