I'm scared of him.

Am I a coward for being afraid of not telling my parents that the guy they trust the most sa's me when he's left to babysit us? I'm afraid of him. Every time I sleep, I get woken up by him entering my room at 11PM to 3AM. I can't lock my door because the lock broke and it hasn't been fixed yet since. I'm afraid of creating big problems for everyone. Every night he comes into my room, he lays down beside me on my bed, gets into my blanket, pulls me close, and gropes my breasts and bottom front part; and I'm still underaged.