官宣文案可以表达你对某人或某事的正式声明和承诺。以下是一些英文官宣文案的例子，你可以根据具体情境选择适合的句子：
1. "You are the one I choose to spend my life with. From now on, you are my official commitment."
2. "With every beat of my heart, I declare my love for you. You are my destiny."
3. "You make every day brighter. I am yours forever."
4. "I am yours, and you are mine. Together, we are unstoppable."
5. "You are the missing puzzle piece to my heart. I am complete when I am with you."
6. "I promise to love you, honor you, and cherish you for all time."
7. "You are the love of my life. I am yours till the end of time."
8. "I stand before you today, not just as your lover, but as your partner for life."
9. "You are the rhythm of my heart. I am lost in your love."
10. "I am yours, and you are mine. Together, we are bound by love."
选择合适的文案，可以表达你对这段关系的珍视和承诺。希望这些建议对你有所帮助!