"I will get a girlfriend."
Translation:Jeg skal nok få en kæreste.
Of that I am not sure, but when I read up on Danish grammar, and also ask around my Danish friends, "Jeg skal nok få en kæreste" translates to English as, "I will probably get a girlfriend", and not merely "I will get a girlfriend.
A few other variations are:
"Jeg skal få en kæreste" = "I need to/must get a girlfriend".
"Jeg vil få en kæreste" = "I want to get a girlfriend".
"Jeg ville få en kæreste" = "I would get a girlfriend".
All the above sentences are without "nok".
The following link mentions "nok", and a few other Danish small words which on first sight do not seem to make sense. http://www.speakdanish.dk/en/grammar/small-words.php