Never! You can’t choose your “relatives” but you CAN choose your family. Setting boundaries and putting distance is a good start…
Basically what Christine said, the only difference between the two is the circle that encompasses the pentagram to form a pentacle. The added circle can signify connectedness or the cyclical nature of Life, Death, Rebirth.
The five-pointed star ⛤ represents the five elements: Earth, Water, Fire, Air, Spirit. Together they are a symbol of life and protection.