This is more of a question than something I'd like you to translate. Are there terms of affection in German? Something like saying I love you, but not that?
Sure there are. Let me list a few:
‘Ich liebe dich’ means I love you, of course.
'Ich hab dich lieb’ means I love you, too, but more in a platonic way, it’s a very sweet expression to tell anyone close to you though.
'Du bist toll/super’ means something along the lines of you’re great.
'Ich mag dich/ich mag dich total/ich mag dich total gerne’ is usually something platonic though, but can be used to tell someone that you have romantic feelings for them.
'Du bist mein Sonnenschein’ - You’re my sunshine.
'Du bringst mich zum lächeln" - You’re making me smile.
'Du siehst super aus’ - You look great.
And to throw in my personal favourite:
“Du bist mein Ruhepol” means something like You are my calming influence, a friend once told me that in highschool and i cried.