You Promised Me

She Promised Me that she wouldn't do it, She promised she would never leave me. She Promised she wasn't going to do it because she knew i needed her, but she did it, after promising she wouldn't. she was my best friend, practically my sister. she didn't even leave me a letter behind, or an explanation. instead she left me behind with depression, anxiety,and isolation.
The fact that I was just so attached to her made her death so hard. she was just such a big piece of my life. What I will never understand, is why she did it, why she felt she needed to die, why she killed herself.