´Gelimde´ 

I understand the rest of the sentence but I´m unsure on ´gelimde´.

Does this mean ´when I come´? The whole sentence was ´gelýmde senýnle uzun býr gece gecýrelým´.

Þimdiden teþekkür ederim

 It should be "geldiðimde": "When I come"

Brilliant I thought it was one of those shortened things

Thank you for your help

it can be "geleyim de" but that doesnt change the meaning that much

yes it is the informal form of  "geleyim de" pointing the future. when i come there...