亲爱的,我这一生只爱你一个人,不离不弃.用英文怎么翻译要最浪漫的

Honey, you are my one and only. I'll never let you down.

Sweetheart, I won't love anyone else but you in my whole life, never to be apart from you!

My dear darling,i will love you forever in my life and i won't let you down

Darling, I love you.
Together we shall be, forever and ever.