And here is toggle´s version with the English modified slightly:

Sen bahara kanma bülbül vuslat yalanmýþ

You do not believe spring nightingale, the reunion had been a lie.

Gül gider de bað bozulur sine yanarmýþ

The rose had gone too, the vineyard had spoiled, the chest had inflamed

Gül bahane kanma bülbül herdem aldanýþ

The rose was a pretext / an excuse, Do not be fooled nightingale, it was always an illusion. 

Bu dünyada baki olan bir tek zamanmýþ

In this world only time had been everlasting

Bizden sonra ardýmýzda kalan yalanmýþ

After us, what remains of our past had been a lie.

The use of ´miþ´ is not always the past perfect tense. It is used to mean ´it seems´ or ´supposedly´ and often used in storytelling,jokes and anecdotes. The past perfect tense is ´miþ+past personal ending´

In this poem IMHO I don´t think the past perfect tense is intended.

eg

Bu dünyada baki olan bir tek zamanmýþ

In this world only time had been is everlasting (it seems)

Just my thoughts.