This is supposed to be deeply personal, not to be followed by anyone else.
If I don't exist I cannot be lonely.
Be good at something.
If I'm good at nothing I can always relate to people that are bad at something.
Deeply care about that something.
Otherwise I cannot have an opportunity to relate that to others.
Finding people that may care about the topic that you know very well of.
This sounds like an act that makes someone less lonely tbh.
Realise that people either don't care about it the way similar enough to the way I care about it, or that people simply doesn't know well enough to make a connection through it.
Imagine being so into something it ended up being the thing that makes me lonely.