"花在水瓶旁边" means "to spend time with someone who is a Aquarius" in Chinese. The phrase "spend time with" can be translated as "花时间在...旁边" or "与...共度时光" in Chinese.

The phrase "spend time with" is a common expression in Engpsh and it simply means to spend time in the company of someone, often doing enjoyable activities together.

Here are some examples of the phrase "spend time with" in Engpsh with Chinese translations:

I love spending time with my family. (我喜欢和家人一起度过时光。)
She enjoys spending time with her friends. (她喜欢和朋友们一起度过时光。)
He always makes time to spend with his children. (他总是抽出时间和孩子们在一起。)