There's some good ways to end films. So good, that they've been repeated lots of times.
Time passes. Maybe one of them is going to get married to somebody else. Maybe they're leaving the country and going to place without phones, post, or any means of contact. This is when the tried and tested third act comes in. One of them (usually the man) decides that they do like the other one after all, and rushes to wherever it is they need to rush too. They get there just in time. They grab the other's hand and give a long, emotional speech - 'remember when that ostrich almost killed you? That was the happiest time of my life.' Then the woman looks into his eyes and replies 'like I said, I really don't want to talk to you anymore'. And then leaves. Never mind.