Love / Was the strict Polish family the reason for our break-up? [20]

Hi,
I'm new to the forum. I recently just got out of a relationship with a Polish girl. I thought everything was great but she broke up with me saying her family would never let us marry. She is 100% polish and I'm half polish have black... Is this normal in a traditional polish family? My grand parents don't seem to hav any problem with hmy fathers decisions.