My 3 1/2 year old Nephew tries to force my 3 year old daughter to do whatever he says...

My nephew is very hyper active. When he and my daughter are together he is constantly trying to force her into playing with a certain toy/game or forcing her to talk to him and what not. My daughter is a typical girl - very gentle, laid back and is quite content playing by herself. My nephew is very over bearing, hyper, he doesn't listen to most people, and is driving me insane! I'm very close to my sister but I have now been distancing my daughter and I because of his behavior. What can I do? What could be the problem? I'd love to have this fixed while he's still young.