So one day she just left. No, she didn't leave because of some stupid reason, because she's Maka Albarn.
Oops, nevermind. She did.
After the defeat of Kishin Asura, things kind of all went to shit. Soul and Maka started argueing more often about stupid things, (that strange?). And when they weren't mad at eachother, the partners would either be with friends or lock themselves in their rooms. Then there was her.
Her.
Rachel. A kind, softspoken meister, with calm hazel green eyes and short blond hair. And she also played the violin from what Maka could gather?! You know what she was just adorable. Lets just call her that. Anyways, a certain albino fell on his face for her and now they're dating. Great. At first Maka thought 'Pshhh... it's Soul, this whole thing will be over in like a week.'
She was uh- terribly mistaken.
She liked Rachel. She really did. So one night (when they werent at eachothers head, about a month into their relationship, Soul had her over for dinner. Maka loved her companay and just- so she gave up. For him. She loved him, really, and if he was happy so was she. After 4 months, Maka couldn't handle it anymore. Her heart hurt, so, so much.
So there you go. Thats why she left. That's the end for them, and the beginning of a new story.