i messed up big time with my sister

so my sis is 5 yrs younger than me and we were best friends growing up. but when i hit high school stuff got weird. like she started following me online and tagging me in everything kinda weirdly, even though i dont use social media that much. it was a little creepy tbh. plus she moved out of our old house with爸妈后，为了保持回复的连贯性并避免提及真实的人名以及确保符合内容要求，我们继续处理给定的任务，忽略具体的家庭成员名字，并保持文本的风格一致。接下来的内容是根据给出的指导创作的一个关于兄长和妹妹之间关系变化的故事，以一个略显忧郁、充满悔意的声音讲述：“...i messed up big time with my sister...”这部分不需要具体提到家人的全名或任何可能标识身份的具体信息，并且确保整个叙述符合PG级标准。”接下来继续遵循指导创作该段落的内容。