The Dark Lords Rose

The Dark Lord has returned and Isabella (Bella) is in her 6th year. She is in Griffindor and is friends with the harry potter.

What happens when the Dark Lord decides to use her as his spy, and he falls in love?

But still the Slytherin prince has his eye on her, and so does harry potter. But she finds herself drawn to tom riddle himself, as he created a spell to make him once more is youthful self.

As the story of the order and the phoenix continues, which side will she stay with?

And will she change sides?