Well i don't believe there is good or bad that is social construct which is why you need assurance,since all morality is based on individual value judgments regarding any given moral issue at hand. Because nothing has value apart from a subject to value it, all value judgments are subjective,To say that a morality is subjective is to say that it varies from person to person, that it cannot be referred to without reference to an individual (or set of individuals). It means to say that there is no morality outside of the individual (or set of individuals). Thus, societal standards are also subjective.so you can't be good with refering to something you are good to,so to say I'm a good person,without objective morality,is a delusion.
Morality is nothing but a product of evolution
Just as noah harari said" There are no gods in the universe, no nations, no money, no human rights, no laws, and no justice outside the common imagination of human beings. Unlike lying, an imagined reality is something that everyone believes in, and as long as this communal belief persists, the imagined reality exerts force in the world."well the only way, you can have an objective morality is if you believe in a religion.