Dear @Hafsa,
Thank you for sharing your question with the Wefugees Community.
I am not an expert on Danish law, but as I learned in my research, for example on this website, the minimum age to get married in Denmark is 18 years.
If I am not mistaken, this will be the case in most of European countries, as you are officially "adult" by that age.
All the best,
Meike