תרגום - טורקית-אנגלית - tek kelımeyle tek

"....you are my favourite..." where is this sentence?

This translation is totaly correct!!

"tek geçmek" is an idiom which is usually used for horse racings. you chose an horse, and it becomes your favourite horse / yani tek geçtiğin at olur

'you are my favourite' diye bir şey bulamıyorum türkçe metinde...

it is an IDIOM. it is used for horses, but we also use it in our daily language to say somebody "you are the one/you are my favourite,etc."

Turkish Language Agency/Türk Dil Kurumu explains "tek geçmek" as: sadece onunla ilgilenmek, sadece ona önem vermek.

please look at here:

http://www.tdk.org.tr/TR/sozbul.ASPX?F6E10F8892433CFFAAF6AA849816B2EF05A79F75456518CA&Kelime=tek%20ge%C3%A7mek