You will need to decide which strategies will be most helpful to you. Being subjected to sex harassment is not your fault. You have a right to want and expect the sexual harassment to stop. These strategies are designed with that goal in mind. You may have tried ignoring or avoiding your harasser and found that the harassment has continued.
Confrontation can be helpful because it gives notice of offensive conduct.
It can also help with self esteem and confidence. You can confront your harasser in person or in writing. You can do it alone or with a friend. You should seek assistance from a University resource. Keep copies of any letters you write.