Robert Pattinson`s new girlfriend `afraid to get serious`

Washington: Robert Pattinson`s new girlfriend, Dylan Penn has confessed that she is concerned about being attached to such a big star.

A source revealed that the 22-year-old model doesn`t want to be known as Rob`s girlfriend.

She is infact afraid to get serious with him and lose her privacy, Us magazine reported.

However, the source also revealed that the `Twilight` star wasn`t ready to be exclusive with anyone right now and was just enjoying himself.