How can I be single by strength and refuse people who like me?

Being single by strength, how to understand this "strength" mainly refers to ensuring your independence economically, taking care of yourself in all trivial matters and not relying on others. At least these two points can be met in order to be single by strength.

People who are truly single by strength can talk to death. If they don't feel anything, they will also refuse all opportunities for ambiguity and love, so it is not so difficult to refuse people who like themselves.