James Preece, also known as The Dating Guru, says there's one sign you can look out for that proves you and your partner are in it for the long haul.
According to James, the most important thing any successful couple must share is a fantastic sense of humor.
'When this is in alignment, you'll be able to see the funny side of most situations and generally be more relaxed about what life may throw at you. Any arguments can be diffused and you'll appreciate each other much more.'