what is the french of I love you?

Answer 1

Je t'aime.

Check out this site for "I love you" in at least 88 different languages.

http://www.electpress.com/loveandromance/iloveyou.htm

Answer 2

Because "Je t'aime" also means "I like you" you might here "Je t'adore" as well.

Sra (aka Mme)