My Innocence was Stolen fom Me.I wanna die.

I feel like Im Dying. Hows does everything change so quickly? And why to me?
I was at a party last night. Lets say I wasnt in the best state of mind to make any great decisions. Needless to say I lost my virginity. And I cant talk about it to anyone . I wanted it to be with someone I loved, and someone who loved me just the same. But its all gone now and I cant stop crying. And today...he denied he did anything. How can someone do this kind of thing.
OH and if that isnt bad enough:
Last night my sisters boyfriend was so drunk he was beating my sister up. He threw her down the stairs and started choking her. I tried helping her but we fell and he purposely kicked me and broke my nose. and the picture I will NEVER forget is how he stared me in the eyes while he did it. He was the only one comforting me from what had happened at the party. Do you know what its like to have no one. Not even your sister?!
And my sister is begging me not to call the cops because she doesnt want her son taken away.
I wish I was dead.