Превод - Swedish-Английски - jag tycker inte bara om dig, jag älskar dig. nu...

I understand the meaning of the quotation marks, but are they there in the original text (i.e. are they indicated grammatically, or in some other way than actual quotation marks), or are they an addition of the translator?

Just for emphasis.
I've took them off.

Don´t know and I might be wrong again but it feels a little "clumsy" I mean the words are right, but -"It´s more than "like" you, I love you." is how I would have written. Maggis