Stronger To Protect You (SLOW UPDATES)

Team Natsu goes on a mission in a village called Star Village. When they arrive, Lucy looks mesmerized by the view of the stars. She felt drawn to them. When they check into the inn, Lucy waits until the others fall asleep to head outside to go into a near by forest. Looking at the stars, she hums an unfamiliar tune, which the stars respond by shining brighter and brighter.
When the team wakes up the next morning they saw something bothering the stellar mage, but When they asked her about it, she said it was nothing she was just lost in thought.
When Team Natsu returns, everyone notices the light of the guild, not greeting them with her usual bright smile. Natsu pestered her over and over again, begging her to tell him what's wrong, but all she said was that she was sorry.

What is wrong with Lucy? And Why was she sorry? Natsu just couldn't figure it out.
What happens when one day she doesn't show up at the guild? And one day turns into a week? Natsu getting nervous decides to check on her but when he reaches her apartment, It's empty. He finds a stack of letters, grabs them, and leaves to the guild to inform the Master. But master already knows.

What happened to Lucy?

Fairy Tail is owned by Hiro Mashima. All I own is the storyline for this fanfic.
**ON HOLD UNTIL ALL CURRENT CHAPTERS ARE EDITED**