Melested..?

ook so.. im 15 and i got melested by.. my dad. hes d and made me watch..usually when i wake up at night he is staring at me in just a robe..he has touched my basically everywhere and one morning i woke up naked and dont remember anything happening the night before.he started doing this when i was about 11 and i have no idea what to do. i mean hes my father but its not right that hes doing that but that doesnt make me want to get him in trouble.its weird and its like i have no dad.. its like hes staring at other things when he is talking to me.. help =/