The fact that you can have an absolute like "true morality" requires that there be a standard of morality. How is there a standard if there is no God? If a supreme being is not in the picture, there can be no morality at all.
Not always, no one should be forced to endure that type of abuse or be involved with psychos like that. The pain, wasted time and bad memories with nothing gained financial or otherwise don't just go away because you walk away.
I made an infographic, summarizing different ethical theories.