1) Facebook has changed how people develop romantic relationships in the initial stages by allowing them to "Facebook stalk" potential dates and learn more about them online rather than having to directly express interest.
2) Being "Facebook official" by changing one's relationship status is now a relationship milestone, but it also means sharing private relationship details publicly online.
3) Facebook can negatively impact relationships and breakups by preventing clean breaks due to continued online contact with exes, as well as creating pressure to stay together from friends and family who see the relationship status online.