How to say "I love you" in Modern Greek?

[Penta]

Hi.

Okay, in looking up Greek (and finding helpful sites that transliterated from Greek to Greeklish), I was able to find 'I love you' fairly easily. S'Agapo.

But, how do I say 'I love you, too' in Greek? That I could never find.

Also, trying to figure out something more broadly:

For some collaborative writing I do, there are two boys. Around 9. In a spaceborne military school. They've come to consider themselves brothers, regardless of whether they're related by blood or not.

Greek, I know, has plenty of words to describe relationships with.

In modern Greek, which word do I use for things like 'Silly brother' or 'I love you, brother'?

 

[Billopoulos]

Well, I have a terrible headache so I will answer your first question which is the only one I can understand at the moment...

S'agapo or S'agapw (in greeklish) is written "Σ'αγαπώ" in Greek!
It means "I love you"!
You can also add here: "Σε λατρεύω" that means "I adore you"!

 

[marilou]

Penta, s'agapo in greek is I love you either if I feel you like my brother or I feel you like my lover...
I love you too I think is "ke ego s'agapo"

 

[Tetina]

S' agapo = Σ' αγαπώ is "I love you" for everyboby, lover, brother, child, friend etc.
if you want to respond is "kego s' agapo" = Κι εγώ σ' αγαπώ (Κι = and / εγώ = i).
Σ' αγαπώ, αδερφέ=S' agapo, aderfe = i love you, brother.