个人觉得，祝福语不需要多么华丽，根据要祝福的人和事,发自内心的祝福就可以了。

You are so important to me.  I can't imagine life without someone like you.
你对我来说是如此的重要，我无法想象我的生命中若没了你会是怎样的一个光景。

You are the one I want to grow old with.
愿能与你白头偕老！

To my ever loving; I am yours forever.
献给我永远的爱人；我将永远属于你。

I'm sorry that I can't be with you on this Valentine's Day.
I send this Valentine's card to remind you that I love you!
很抱歉！这个情人节我不能陪你。我送上这张卡片是要提醒你：我爱你！

After 20 years, our love is even stronger than before.
20年已经过去，我俩的爱情历久弥坚。

Our love grows stronger with every passion year.  Happy Valentine's Day, Baby.
我俩的爱一年比一年更坚定。小宝贝，情人节快乐！

I fell in love with you when I first saw you, and I still am after 20 years.
挺好次见到你就爱上了你，在20年后的今天，对你的情愫仍丝毫未减。

There is nothing in the world I'd rather do than spend an evening cuddling you.
在这个世上没有一件事比在夜晚和你相依偎更想去做。

I am so lucky I met you! You make my days brighter.
You make me happy.  You give me many reasons to smile every day.
我很高兴能遇见你。你让我的日子更闪亮、让我快乐、给了我每天欢笑的理由。

There's nothing in the world more beautiful to me than having you,
and I want you to know that I appreciate you.
在这个世界上没有一件事比拥有你来的美妙，我只想让你知道，我很感谢你！

I'm here to lend helping hand; I'm here to listen and understand; I'm here to brighten your day;
我会在你需要的时候伸出援手，在这儿聆听你的心事，去了解你；

I'm here for you every single day…because you are the most important person in my life.
我会让你的日子过得更闪亮，每一天都为你。因为你是我生命中最重要的人。

I will be your Valentine until the end of time.
地老天荒，我将是你的情人。

I made the right choice when I decided to marry you.  Be my Valentine forever!
决定跟你结婚是正确的选择。做我永远的情人吧！

Through tears and smiles, laughter and heartache, you've been a part of my life.
在一连串的欢笑、泪水和感动中，你已经成为我生命中的一部份。

I can't imagine getting though the day without hearing your voice or seeing your smile.
我实在无法想象日子若没了你的声音，没了你的笑容会是怎么样。

I can't live a single day without you.
我不能一天没有你。

You changed my life for the better, and I treasure you and our love.
你让我的生活变得更美好，我珍惜你，也珍惜我们之间的爱。

You are the only one I've ever cared for in this world.
你是我今生最关爱的人。

Darling you can count on me till the sun dries up the sea.
达令~你可以信赖我直到海枯石烂。