So here I gave a try to translate it, and because I'm not sure in some parts let somebody check it out
Edited:
Što te nema, što te nema?
why you are not here, why you are not here
Kad na mlado poljsko cvijeće,
when on a young field flower
Biser niže ponoć nijema,
the pearl threads the night
Kroz grudi mi želja lijeće,
trough the chests wish me...
Što te nema, što te nema?
why you are not here, why you're not here
Kad mi sanak spokoj dade,
when the dream gives me a calmness
I duša se miru sprema,
and the soul is preparing for peace
Kroz srce se glasak krade,
through the heart a voice is sneaking
Što te nema, što te nema?
why you're not here, why you're not here
Procvjetala svaka staza,
every path has bloomed
K'o što bješe divnih dana,
like it was when the days were wonderful
Po ružama i sad prska Bistra voda šadrvana.
among the roses and now the fountain sprinkles a pellucid/clear water
Ispod rose zumbul gleda,
under the dew a hyacinth is wathcing
Iz behara miris vije,
A scent is winnowing from the blossom
A za mene k'o da cvili,
and for me who to whine
I u bolu suze lije.
and to cry tears in pain
Što te nema, što te nema?
why you're not here, why you're not here
Vedri istok kad zarudi,
when the bright east gets glow
U treptaju od alema,
in the twinkle from a diamond
I tad srce pjesmu budi,
and then the heart wakes up a song
Što te nema, što te nema?
why you're not here, why you're not here
I u času bujne sreće,
and in the glass wild happiness
I kad tuga uzdah sprema,
and when the sadness is preparing a sigh (to breath)
Moja ljubav pjesmu kreće,
my love is moving (starting) with a song
Što te nema, što te nema?
why you're not here, why you're not here
Kako mi je srce jadno,
how my heart is miserable
Kao da ga neko bode,
like someone is sticking into it
Te sve place i sve pita:
it cries and asks all over again
Kuda moja ljubav ode?
where my love did go
Je li griješna sabah zora,
is it the morning down sinfull
Il' nebeska sjajna zvijezda,
or a sky shineing star
Je li griješna ljubav moja,
is my love sinful
K'o glas ptice iz gnijezda?
like a voice of a bird from a nest