"care about" and "care for" are usually translated the same way as "love".
A plain "je l'aime" ("I love him") would probably not convey the strength of your statement, but it's something you can build upon, like "je l'aime de tout mon cœur" (I love him with all my heart) or any other similar expression.
Love = aimer In french.
The French for "What I love" is "Ce que j'aime".
"L'amour."
J'taime
On t'aime
Love in French is spelled "amour".
"My love" in French is spelled "mon amour".
"I love you" in French is spelled "Je t'aime."
amour, l'amour
Je l'aime.
jeune amour
amour spirituel