* Ross and Rachel had an on-again, off-again relationship throughout the series.
* They finally ended up together and married in the series finale.
* Chandler and Monica
* Chandler and Monica were best friends who fell in love in Season 4.
* They got married in Season 7.
* Joey and Phoebe
* Joey and Phoebe were just friends throughout the series.
* They never dated or ended up together.