Help Me Please!!

Someone Let me know if you know what book this is I forgot the name and can't find it

Its Harry Potter he parents are Severus Snape and bartimus crouch jr. I think. Harry kills Ron Weasley, hermione granger, and Ginny Weasley and probably a few others. At one point he pretends to be mute. He is friends/lovers I can't remember which with Draco malfoy