I'm linking to an interesting discussion about what makes a happily-ever-after for readers. Some want exchanged I-love-yous, marriage, and kids in the epilogue. Others are content with a committed couple.
I'm in the committed couple category. If it works for the story, then I love yous are terrific. Sometimes, though, "I love you" doesn't seem realistic.
I'm revising The Seventh Sense now, but it currently ends with the hero/heroine as a committed couple rather than more. It's clear this couple belongs together, but they've known each other less than a week by the end of the story, so a marriage proposal didn't seem appropriate. I think it's the best, most realistic end to the story.