Formal:
* 爱 (ài): This is the most common and general way to say "love". It can be used for romantic love, familial love, love for friends, or even love for a hobby.
* 爱情 (ài qíng): This literally means "love feeling" and is more specific to romantic love.
* 热爱 (rè ài): This means "love passionately" and is used for a deep and fervent love.
Informal:
* 喜欢 (xǐ huan): This means "like" but can also be used to express "love" in an informal context, especially for things or activities.
* 爱慕 (ài mù): This means "to admire" and can be used to express romantic attraction or love.
* 迷恋 (mí liàn): This means "to be infatuated with" and is often used to express a passionate or obsessive love.
Other variations:
* 爱恋 (ài liàn): This means "to be in love" and has a romantic connotation.
* 深爱 (shēn ài): This means "to love deeply" and emphasizes the intensity of the love.
The specific word you choose will depend on the context and the level of formality you want to convey.
Here are some examples:
* 我爱你 (wǒ ài nǐ): I love you. (formal, romantic)
* 我喜欢你 (wǒ xǐ huan nǐ): I like you. (informal, could be romantic)
* 我爱我的家人 (wǒ ài wǒ de jiā rén): I love my family. (formal, familial love)
* 我热爱音乐 (wǒ rè ài yīn yuè): I love music. (formal, passion for a hobby)
Remember that the meaning of words can change depending on the context and tone of voice. It's always best to consider the situation carefully before using any of these words.