i agree with omnimech however i do think the safest bet in a happy marriage is to get married when your life is stable - job, finance, career, family problems, education, life goals etc. Thing is people change alot as they grow, especially in their youth. So believing you're in love at a young age is one thing. But promising someone at a young age you'll be their partner for life (marriage) is a whole different league altogether.

So if you can, wait. You never know what or who might happen