What word best describes someone who likes to do everything on his own? [closed]

This doesn’t mean that they are unsociable or always keep everything secret. They just love to do things by themselves to feel as if they don’t need anyone else doing this for them. Is there any word or phrase that can interpret this full meaning?

Solution 1:

Self-sufficient has the connotations of not needing others.

Especially in the second meaning from Dictionary:

having extreme confidence in one's own resources, powers, etc.

He was self-sufficient, and always reminded you of it.

Solution 2:

The word independent comes to mind. It has the positive connotation of being solitary without malice.

Selected meanings from Merriam Webster:

1. not dependent: such as
   a. (1) not subject to control by others : SELF-GOVERNING
   

   b. (2) not looking to others for one's opinions or for guidance in conduct
   

   c. (1) not requiring or relying on others (as for care or livelihood):
   independent of her parents
   

   d. showing a desire for freedom:
   an independent manner