Praise be to Allah.
We ask Allaah to make it easy for you to get married and to help you to do that. As for taking a loan with interest, it is haraam and is a grave major sin which it is not permissible to do in such cases. Allaah says (interpretation of the meaning):
“And whosoever fears Allaah and keeps his duty to Him, He will make a way for him to get out (from every difficulty)”
We advise you to seek the help of Allaah and turn to Him and ask Him to make things easy for you, and to plan well, budget and be patient until Allaah decrees a way out for you.