What these boys are doing is prohibited in Germany.
You should not be ashamed.
What these boys are doing can be punished.
Girls and women in Germany have the same rights as boys and men.
Nobody is allowed to harass you.
Nobody is allowed to touch you against your will.
Nobody is allowed to frighten you or hurt you.
Tell your teacher about it.
Or someone else you trust.
You can learn how to react to foolish advances.
There are courses where you can practice this with other people.
You will learn how strong you are.
You will learn when you should run away.
You will learn what you can say.
You will learn who can help you.
You can take a course with a friend.
Your teacher can tell you where you can take a course.
You can also ask the school therapist or social worker at school.
You are not doing anything wrong.
The boys are responsible for their behaviour and must change.