Self-sufficient
Self-sufficient , adjective
1.
Sufficient for one's self without external aid or cooperation.
Neglect of friends can never be proved rational till we prove the person using it omnipotent and self-sufficient, and such as can never need any mortal assistance.
2.
Having an overweening confidence in one's own abilities or worth; hence, haughty; overbearing.
A rash and self-sufficient manner.