Formal:
* Je vous aime: This is the most formal way to say "I love you" and is typically used for someone you respect greatly, like a parent or a teacher.
Informal:
* Je t'aime: This is the most common and informal way to say "I love you" and is used for close friends, family members, and romantic partners.
Romantic/Passionate:
* Je t'adore: This is a more passionate way to say "I love you" and implies a deep and intense love.
* Je suis fou/folle de toi: This literally translates to "I am crazy about you" and is a very romantic way to express love.
* Je t'aime à la folie: This means "I love you madly" and is another passionate way to say "I love you."
Other ways to express love:
* Tu es mon/ma chéri(e): This means "You are my darling" and is a very affectionate way to address someone you love.
* J'ai une tendresse pour toi: This translates to "I have tenderness for you" and is a more subtle way to express love.
* Tu es mon/ma tout: This means "You are my everything" and is a very strong declaration of love.
Note: The use of "tu" and "vous" depends on the level of formality. "Tu" is used with friends, family members, and people you are close to, while "vous" is used with people you don't know well or people you want to show respect to.