My big-brother's friend did this...! Can you help?

Last night,my bro's friend came,I told his friend that he is gone out with parents and will come back after the day after tommorow.Hearing this,he came inside and closed the door.He start asking harrasing ques and tried to flirt but I slaped him.He got angry n hold me n carry me to another room and lay me on the bed and start snatching my clothes.He took my shirt off and violently flirt with me and lick my neck and chest.He told me that he is coming today also,I am so scared.(This time its not fake story).Should I tell my bro about this?