This is a movie that I watched a long time ago as a kid. I remember there being an alien prince who crashed landed on Earth with his faithful servant. They were being protected by a human girl and her family in their house from the government that was after the alien.
The human girl then helps nurse the alien prince back to health while they are hiding out. They start to fall in love and I think in the end the girl decides to go with him to his home planet to be his queen.