要分开英语作文，你可以遵循以下步骤：
开头
用温暖的问候开始，表达你对这段关系的尊重和感激。
可以简短地提及你们共同度过的美好时光，为接下来的转折做铺垫。
表达决定
清楚地表达你想要结束这段关系的决定。
使用“I think”或“I believe”等表达个人观点的词汇，使文章更具说服力。
原因
简要说明导致你做出这个决定的原因。
可以涉及你们之间的问题、价值观的差异、未来的规划等。
情感表达
描述结束关系时的感受，如悲伤、失望、感激等。
使用第一人称“I”来传达个人情感，使文章更具感染力。
未来展望
表达你对未来的期望和祝福。
可以提及希望对方能够找到幸福，或者你们能够保持友好的关系。
结尾
用一句温馨的结束语来收尾，再次表达感谢或祝福。
签名并注明日期。
```
Dear [Recipient's Name],
I hope this letter finds you well. I've spent many wonderful moments with you, and I will always treasure the memories we've created together. However, after careful consideration, I've decided to move on from our relationship.
I believe it's time for both of us to explore new paths and find new beginnings. While we've had our share of challenges and differences, I've learned a great deal from our experiences and am grateful for the growth we've achieved together.
I wish you all the best in your future endeavors and hope we can maintain a friendly relationship. Thank you for being such an important part of my life.
Sincerely,
[Your Name]
[Date]
```
请根据你的具体情况和感受，适当调整信中的内容和语气。记住，真诚和尊重是写分手信的关键。