好きだよ　sukidayo 　　or 好きです　sukidesu = I like you あなたのことがとても好きです, きみがめっちゃすきだよ　＝　I really like you ( former is more polite, latter is more impolite and slang ) These are often used. あいしてるよ aishiteruyo　　あいしてます　 aishitemasu　　　I love you あなたのことをあいしてます anata no kotowo aishitemasu　　きみをあいしてるよ kimiwo aishiteruyo　　 Same thing, former is more polite, latter is more impolite 1. Note that usually, the impolite form is used as one usually knows the other. It's not like you two are strangers. 2. "I love you" is used very frequently in the US ( I don't know about Germany ); In Japan, it's seldom used since it has tremendous value and meaning. You just don't find couples saying " aishiteru " when they leave for work, or they say bye to each other.

moshi yokattara, tomodachi ni nattekudasai. I like you. (Anata ga) suki desu. (Das heißt wie "Können wir ein Pärchen werden", wenn du das einem Freund sagst") I love you. (Anata wo) aishiteimasu. Du kannst das sagen, wenn du den Man heiraten möchtest.

lets be friends=tomodachi narou ka i like you= suki desu i love you=aishiteimasu then again i am English so i cant say 100%:),but i am also studying japanese.