Twilight star Kristen Stewart reportedly kept calling boyfriend Robert Pattinson on Valentine's day, but the actor didn't respond.

The 22-year-old actress, who did not exchange cards with Pattinson, bombarded the 26-year-old actor with calls while he is in Australia filming for new movie
'The Rover', reported Sun. "Stewart only got an engaged tone," a source said.

The Snow White and The Huntsman star spent her Valentine's Day with her mother, Jules Stewart. "Kristen spent the day with her mom, and her little brother Taylor Stewart," the source added.

ctress Kristen Stewart has sent boyfriend Robert Pattinson a long love letter in a bid to repair their fractured relationship.

"Kristen wrote a long letter explaining her love to Rob. She feels that even if he can't forgive her, he should know that she is closer to him than anyone else could ever be," showbizspy.com quoted a source as saying.

The couple recently agreed to a trial separation.

Meanwhile, Stewart, 22, is said to be angry that Pattinson isn't giving her enough attention while he films The Rover in Australia.

"She was devastated when Rob suggested they go on a trial separation, and Kristen has been eager to visit him, but now she is getting seriously angry at Rob because he is so bad at keeping in contact," added the source.

With Pattinson out of the country, thousands of miles away working in Australia, Stewart has been missing him badly.

"Robert is often starting his working day when Kristen is busy, and vice versa. And he is not the best at sending texts, or keeping in touch in the first place. Kristen is angry with him because she thinks he's not giving her enough attention, it's absolutely killing her," said the source.

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