My cousin likes me as more than jus a cuz?

so my cousin is a year older than me and has told me many times that he wants to be my boyfriend but i think its wrong cuz were cousins. he has kissed me on the cheek , tried to force me to kiss him on the lips and has also grabbed my boobs many times and my butt but i cant do anythin about it cuz he could hurt me if he wanted to and could ruin my life cuz he knows all my secrets. i dont wanna tell anyone cuz they wouldnt let me go over to my nanas anymore (thts were my cousin stays) so wut do i do???