1. "We are proud to announce that [name] and I are officially in love and engaged."（我们很自豪地宣布[名字]和我已经正式坠入爱河并订婚了。）

2. "Finally, my ride-or-die chick!"（终于，我的死忠伴侣!）

3. "We are officially a couple now."（我们现在正式成为一对情侣了。）

4. "You're everything, my BFF for life!"（你是一切，我生命中的挚友!）

5. "After much consideration, [name] and I have decided to go public with our relationship."（经过深思熟虑，[名字]和我决定公开我们的恋情。）

6. "From now on, one person becomes two, jointly writing the romantic chapter of love."（从现在开始，一个人变成两个，共同书写爱的浪漫篇章。）

7. "At the moment I met you, the world became colorful. With you for the rest of my life, I am filled with joy."（遇见你的那一刻，世界都变得绚丽多彩。余生有你，满心欢喜。）

8. "You are my everything, my BFF for life!"（你是一切，我生命中的挚友!）

9. "Tell me you are mine. I'll be yours through all the years, till the end of time."（请告诉我你是我的。岁岁年年，我都属于你，永远永远。）

10. "If living on the earth is a mission from the lord... living with you is the award."（如果生活在地球上是一种来自上帝的使命……那么与你一起生活就是奖赏。）

这些短句适合用于社交媒体、博客或其他公开场合，以正式或浪漫的方式宣布恋爱关系。