What legal action can be taken in the case of harassment

Sir a person which live in my street when ever my any friends o to meet regarding education or any project work in my street. he stare with smoke cannabis or try to fear with eyes or whenever anyone talk with me he stare him which I don't like because now I don't have any friends and don't talk to me any one like my neighbors when he lives in my street because of his fear and whenever talk to me he tourble him now not anyone friend with me and I feel very alone in my colony. Also whenever if I talk my brother or father he stare my brother or father or whole faimly. Which make me sad after I can not do anything. Because father say we don't have to have enough money to fight against or my father don't have courage they fear. Because some time before he send dirty what's up meassage with his wife or another boy have recognized by his language or I'm student of computer science or an national player in scien but now he always try to fear my whole family now not any come in my house.