This expression actually means "to like" but it's the most commonly used form of expressing love. If you add "dai" to the beginning ("daisukidesu") it means "I really like you."

, This is best used to convey true and committed feelings of love. Nothing about this expression speaks to friendship. Do not use it unless your feelings are strong.
 This means "you are precious" and may be a preferred way to express your feelings if you're not quite ready for a committed relationship.
 This can be translated "Don't you know how much I love you?" Uttering this expression is a way to offer an explanation--"nan" is used when giving or asking for explanations.
 Those who perhaps are a bit too practical to believe in love at first sight, might talk about "koi no yokan," which refers to the feeling upon meeting someone that love is in the cards, in time.
suki desu 好きです.
kimi wa ai shiteru A  Iしてるの君.
taisetu 大切.
suki nan da 好きなんだ.
koi no yokan.
{"src": "wikihow-all_validation", "title": "How to Say I Love You in Japanese2"}