Formal:
* 我爱你 (wǒ ài nǐ): This is the most common and direct way to say "I love you" in Mandarin. It is used in romantic contexts and is considered quite formal.
* 我爱 (wǒ ài): This is a more concise way to say "I love" and is used in various contexts, such as when expressing love for family, friends, or hobbies.
Informal:
* 我喜欢你 (wǒ xǐhuan nǐ): This literally translates to "I like you" but is often used to express romantic feelings in a more casual setting.
* 我爱你 (wǒ ài nǐ): Although formal, this phrase can also be used informally, especially among younger generations.
To write these phrases in Chinese characters:
* 我爱你 (wǒ ài nǐ)
* 我爱 (wǒ ài)
* 我喜欢你 (wǒ xǐhuan nǐ)
Remember that context is important! Consider the relationship and the situation when choosing the right phrase.