When you were a child, you always gave your best to please your mother to win her love and affection. But that seldom or never happened.
As a grown-up, you still feel the need to prioritize others before yourself. Setting boundaries is really challenging for you.
You cannot focus on your own needs because you feel responsible for other people’s happiness and well-being (just as you feel/felt responsible for your mother’s happiness).
Because of that, you often end up being taken for granted, and you attract people who feed off your love and empathy, like players, narcissists, and similar.