* Ek is lief vir jou. (This is the most common and literal translation.)
* Ek het jou lief. (This is also common and means "I love you" in a more romantic sense.)
* Ek hou van jou. (This means "I like you" and can be used in a more casual or platonic way.)
You can also say "My liefde" (My love), which is a more endearing way to express affection.