Depending on context, only love can be translated as:
nur die Liebe
or liebe nur
The only way to say 'i love you' is to actually say the words. Whether they be in English, Japanese, German, or sign language, that's it.
Will you love in German is wirst Du lieben
But do you love me is aber liebst Du mich? in German.
English: "I am in love" is German: "Ich bin verliebt".
Liebe
Well they do say liebe = love
I am really in love with you is Ich bin wirklich in dich verliebt in German.
(die) Liebe - love (noun) lieben - to love
mit lebe
Wanderlust
Vaterliebe du=Father love you
I=Ich Love=Liebe You=Du or Dich