Hi There, If nobody can remember why they fell out all those years ago it couldn't have been something that huge or important. Get both of them together; knock their heads together and tell them to get it sorted. Otherwise lots of people are going to miss out especially if you both decide to go abroad to get married. Talk to them individually and explain how important it is to you that they make up. Then bring them together and leave them to sort it out. GOOD LUCK MRS S