Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 6 months ago

Being together with out any type of marriage whether permanent or temporary is sinful act. You both can recite a temporary marriage agreement if the father of the girl agrees that you be together. This temporary marriage can be recited between you with out publicity if her father does not object, and will save you both from falling in sinful acts. When you both get elder, then you can go for permanent marriage (Nikah) though you are now not too young for marriage as your parents think.

Wassalam.