STALKER PLS HELP

So this boy that goes to my school use to be close friends w my bf but then he started beung weird towards me. I play volleyball and usually get back to the school to get my car around 9pm well the last 6 games this boy has been waiting by my car and won’t let me drive away bc he wants to “talk” my boyfriend and his whole family has went off on him but he won’t stop idk what to do it’s gotten so bad that my coach has to drop me off at my car but now the boy just waits until my coach drives away I’m scared and alone please help