Relationship testers

Want to know if your Significant Other is The One? How about if you can manage stress? How well can you work with each other? Can the relationship survive the cheats or betrayals? Here are some games to find out! Take all of these as franchises, except where multiple entries are found, since the changes were so abrupt. Also, these games have been curated thinking on non-gamers also, so the entry barrier isn't an excuse.