1. You're making me laugh: This is the most common meaning, implying that the person is finding the speaker's words or actions humorous. It's usually said with a smile and a lighthearted tone.
2. You're being sarcastic: This meaning is less common, but it's possible if the speaker is implying that the person is being ridiculous or foolish. The tone of voice will be more cynical or sarcastic.
3. You're being strange or eccentric: This meaning can be used when someone is doing something unusual or unexpected, especially if it's not in a way that's typically considered funny. The tone of voice can be curious or slightly amused.
4. You're making me uncomfortable: This meaning is rarely expressed directly, but it can be implied if the speaker is feeling awkward or embarrassed by the other person's behavior. The tone of voice will be more strained or hesitant.
In summary, the meaning of "you're funny" depends on the context, tone of voice, and relationship between the speaker and listener.