Today is a special day, it's the day you were born. (make sure you are smiling)
Happy Birthday love/luv. - 愛しいヤツお誕生日おめでとう。何々～love/luvは家族、親友、恋人に使えます（イギリスよりの英語です）
Today is a special day, it's the day you were born. 今日は特別な日、君が生まれた日。（笑顔で！）これはもう相手が特別である事がわかりやすいですよね。あまーーーーーーい！
Some couples have 'pet names' - names they like to call each other e.g. darling, honey, sweetheart.
My husband calls me lots - depending what mood he's in :)
As long as you say Happy Birthday then you can add another 'pet name' on the end
Hope this helps
Jane:)
I’d like to wish a lovely and very Happy Birthday to the prince in my life.
Your birthday is so special to me — as special as you are in my life.
Here are a few cute ways for wishing your boyfriend on his birthday :
Let your birthday be full of love and happiness, just as our relationship has been blessed with these delightful qualities!
Happy Birthday to the sweetest person I know! Have an awesome day and stay blessed. Happy Birthday!
The best thing in the world is getting to celebrate the birthday of the one you love. I am so lucky I can call you mine. Happy Birthday.
I am so excited to spend the day with you! I have the most amazing birthday surprises planned. I know you will never forget today, Happy (age) Birthday!
彼氏の誕生日に誕生日おめでとうをいうキュートな言い方です。
Let your birthday be full of love and happiness, just as our relationship has been blessed with these delightful qualities!あなたの誕生日をいっぱいの愛と幸せで満たしましょう。私たちの関係がこれらの素晴らしいもの（質）で祝福されているのと同じように。
Happy Birthday to the sweetest person I know! Have an awesome day and stay blessed. Happy Birthday!私の知る限りで一番かわいいひとへ、お誕生日おめでとう。素晴らしい一日と祝福を。お誕生日おめでとう
The best thing in the world is getting to celebrate the birthday of the one you love. I am so lucky I can call you mine. Happy Birthday.世界で一番素晴らしいことは自分の愛する人の誕生日を祝うこと。あなたのことを私のものだって言える私はラッキーね。お誕生日おめでとう
I am so excited to spend the day with you! I have the most amazing birthday surprises planned. I know you will never forget today, Happy (age) Birthday!あなたのこの日を過ごせることをとてもワクワクしているわ。すごいサプライズを用意しているのよ。あなたは今日という日を忘れられないはずよ。～歳のお誕生日おめでとう。Ageのところに、20th、35thなど何番目のという表現を入れましょう。20歳なら20ではなくて、20thになります。20回目のという意味です。
A) Happy birthday my love i hope it's as special as you.
B)As a second passes my love for you also raises, so, let’s celebrate the special day where love gets even stronger Happy Birthday my love!
Hello Maimai :-) I hope this helps!
A) Happy birthday my love i hope it's as special as you.
Definitions
*Special - wonderful/ dear
B)As a second passes my love for you also raises, so, let’s celebrate the special day where love gets even stronger Happy Birthday my love!
*As time passes-> As time goes by your love grows
こんにちは Maimaiさん :-) 回答がお役に立てば幸いです!
A) Happy birthday my love i hope it's as special as you.（お誕生日おめでとう。あなたと同じくらい特別な日になりますように）
定義
*Special - 素晴らしい/価値ある
B)As a second passes my love for you also raises, so, let’s celebrate the special day where love gets even stronger Happy Birthday my love!（時間とともにあなたへの愛情が膨らんでいます。さらに強い愛となる特別な日をお祝いしましょう。お誕生日おめでとう！）
*As time passes-> 時間が経つにつれ愛が大きくなる
You can customize the term "happy birthday' with your favorite pet name for him/her.
Examples
Angel
Baby
Bunny
Honey
Sweetie
Lovey
Any name that is personal to you will work.
__________________________________________________________________________________
Example
Happy Birthday, baby. I hope that I get to spend the rest of your birthdays with you.
"happy birthday' の後にあだ名などをつけて自分なりにカスタマイズできます。
例
Angel
Baby
Bunny
Honey
Sweetie
Lovey
どんなあだ名でも大丈夫です。
__________________________________________________________________________________
例
Happy Birthday, baby. I hope that I get to spend the rest of your birthdays with you.
誕生日おめでとう。この後は一緒に過ごしてくれたら嬉しいな。
The normal greeting to anyone on their birthday is 'Happy Birthday!' However, a more traditional form is shown in the second example sentence. Of course you can add a message or pet name of your choice: darling, honey, babe, etc
アメリカ合衆国 
日本 
イギリス 
南アフリカ 
カナダ 
