Your cousin is not allowed to do that.
Nobody is allowed to touch you in your intimate areas.
Whether you are a girl or a boy.
You are too young.
That is not permitted in Germany.
When you are older, you are allowed to decide who touches you by yourself.
You should tell your carer.
They can get help for you.
So that it doesn’t happen again.
You can also get help at an advice centre.
Important:
You are not guilty.
You will not be punished.
Your cousin can be punished if you want him to be.
Then you must make a complaint to the police.
An advice centre can help you with that.