The loneliness at the top is real, and it is not a character flaw. It is structural. Which means the way out is structural too.
You are surrounded by people and still alone. The team cannot carry the full weight with you, because they report to you. The investors are not a place to be uncertain out loud. The people in your personal life love you and do not always understand the specific gravity of what you are holding. So you hold it by yourself, and you call the isolation the price of leadership.
Where the loneliness actually comes from
It comes from position, not personality. The founder seat is the one place in the company where the buck genuinely stops, and that creates a specific kind of solitude that effort cannot fix and a great team cannot fully relieve. Understanding that it is structural matters, because it stops you from reading the loneliness as evidence that something is wrong with you. Nothing is wrong with you. You are simply sitting in the one chair that does not get to be uncertain in front of the room.
The loneliness is not a flaw in you. It is a feature of the seat. And the seat has a remedy.
The remedy is a peer to the position
The way out is not more team and it is not toughing it out. It is one relationship that sits level with the position: someone who has held the same weight, who you can be uncertain in front of, who is not below you on the org chart or invested in the outcome. That is what the right advisor or peer actually is. Not another report, but a place the founder gets to set the weight down and think clearly. The loneliness was structural. So is the relief.