Im a hindu wanting to marry a muslim but parents wnt agree?

i know its hard,but stick to what u believe,im irish catholic and my boyfriend is also hindu(punjabi)we have been together nearly 3 years,we have twins that are 14 months old,at first his father didnt care that i was having his grandchildren and tried to set my fella up with a girl in england,his father came over to england from india and my fella went to england to meet him,my fella wouldnt meet this girl and told his father that he was with me now and he was eventually going to marry me,so now they accept me,and they love there grandkids,and his mother wants to arrange our marraige when we eventually get over there,and also they are delighted that there 3rd grandchild is on its way in 2 weeks time,so hopefully ur parents are modern enough in there thinking to let u live ur life as u want,good luck