*Nerelerde kaldin = whereabouts have you been/what's taking you so long?
**serv-i naz = literally means elegant pine tree. It is a commonly used metaphor for a slender, elegant woman in Persian and Turkish literature.
***the word niyaz is literally translated as "need". So one could also say "this is my need" or "it is this that I need".

I believe these lyrics are an old poem written by Ismail Hakki Bey, a 17th century Ottoman scholar.