Romantic/Sweet:
* 宝贝 (Bǎobèi): This means "baby" or "darling" and is a very common term of endearment.
* 亲爱的 (Qīn'ài de): This means "dear" or "beloved" and is a little more formal than "Bǎobèi".
* 我的心肝 (Wǒ de xīngān): This means "my sweetheart" or "my darling" and is a very affectionate term.
* 我的公主 (Wǒ de gōngzhǔ): This means "my princess" and is a playful and romantic way to refer to your girlfriend.
* 我的天使 (Wǒ de tiānshǐ): This means "my angel" and is a very sweet and loving way to refer to your girlfriend.
Playful/Fun:
* 小可爱 (Xiǎo kě'ài): This means "little cute one" and is a playful and endearing way to refer to your girlfriend.
* 傻瓜 (Shǎguā): This means "fool" or "silly" but is used in a playful and affectionate way.
* 笨蛋 (Bèndàn): This means "idiot" but is also used in a playful and affectionate way.
* 我的小淘气 (Wǒ de xiǎo táoqì): This means "my little rascal" and is a fun and playful way to refer to your girlfriend.
Formal/Respectful:
* 亲爱的 (Qīn'ài de): This means "dear" or "beloved" and is a good option if you want to be more formal.
* 我的爱人 (Wǒ de àirén): This means "my beloved" and is a very romantic and respectful term.
* 我的妻子 (Wǒ de qīzi): This means "my wife" and is a very formal and respectful term.
It's important to choose a term that feels comfortable and natural to you. It's also a good idea to ask your girlfriend what she prefers to be called.
Remember, the best way to show your love is to be genuine and to use language that makes your girlfriend feel special.