Is the questioner sinful for lying and claiming to be married to ward off girls, and how can he convince his family of the necessity of his marriage while he is in a European country, especially since one of the girls is pursuing him and inviting him to fornication or an urfi marriage?

We ask Allah to keep you steadfast in chastity. Your role model is Yusuf (عليه السلام), who protected himself from indecency. Supplicate to Allah to turn away the wiles of women from you, and avoid them as much as you can. There is no harm in lying that you are married if it is a means to distance them, and alluding is better than outright lying. Strive to convince your parents of the importance of marriage. If you fear falling into the forbidden, you may marry even if they do not approve. The permissibility of residing in lands of disbelievers is conditioned upon the Muslim's security in his religion; otherwise, emigration becomes obligatory.