What should i do !!!!???!!!??!!!?

Erm basicall what happened was i was sleeping in my big cousins house and my girl cusin s like 18 and her bro was about 1 year younger than mee we slept there there was a bunk bed in the bys room and i had to sleep on the bottom bed after when we slept In the same room but the boy was so ******* hot i must say anyway after that we was sleeping and i had a sleeping gown on it was quite short and my bra was small so my were hanging out my bra also i was wearing a thong a g-string anyway i was sleeping when he came and pulled my sleeping gown up and started grabbing and squeezing my s also licking them and biting then he pulled my thong down and felt around my *** i was half asleep half awake i didnt really know what was going on i hate saying this but it fel so good and when i woke up i remembered everything iM reqly brave s i woke up and hit him and asked why he did it after he told me to shutup and i screamed you pervert so he picked me up and took me to his room and took my clothes off just leaving me wih thong and bra after he kept feeling around my and chest and snogged me forcingly it kinda turned me on when he was feeling around my chest but i dont like him and dont want to carry on mu mum was at shopping with his mum so we was alone m girl cousin was at her friends iam 16 and he is 15 i cant tell my mum !