Formal:
* Tu me fais rire. (You make me laugh.) - This is the most common and direct translation.
Informal:
* Tu me fais bien rire. (You really make me laugh.) - This adds emphasis to the sentiment.
* T'es trop marrant(e). (You're too funny.) - This is a more colloquial expression.
* Tu me fais mourir de rire. (You make me die laughing.) - This is a more exaggerated way of saying "You make me laugh."
Other options:
* Tu me fais sourire. (You make me smile.) - This is a gentler way to say "You make me laugh."
* J'adore ton humour. (I love your humor.) - This focuses on the person's humor rather than the act of laughing itself.
The best option will depend on the specific situation and your relationship with the person you're talking to.