YESTERDAY: BEVERLY HILLS, 90210
TODAY: DAWSON’S CREEK
JEN-DAWSON-JOEY
How It Started: Best friends since they were little kids, Joey and Dawson’s friendship begins to fracture when Dawson becomes infatuated with the new girl in town, Jen. Though Joey is harboring secret romantic feelings for Dawson, he begins seeing Jen.
How It Ended: Dawson’s relationship with Jen doesn’t last long and he soon realizes he has feelings for Joey, too. They are together off and on throughout the series (they end off; see below) but Dawson and Jen also get back together for a short time in season 5.
Key Episodes: 1.1, 1.7, 1.10, 1.12-1.13, 2.1, 2.3, 2.10-2.11, 4.23, 5.8, 5.10, 5.17, 5.23, 6.1-6.2
YouTube Evidence: Jen, Dawson and Joey: The Girl Next Door; Joey, Jen, Dawson–Over You
DAWSON-JOEY-PACEY
How It Started: In season 3, Pacey begins to develop feelings for Joey. Much to Joey’s surprise, she does as well. They hesitantly pursue a relationship in secret but Joey calls things off after Dawson finds out and reacts negatively. By the end of the season, though, Dawson realizes he cannot stand in the way of their love and so Joey and Pacey begin a relationship.
How It Ended: The memories of her relationship with Dawson hang like a cloud over both Joey and Pacey during their relationship. They break up towards the end of the season 4, and Joey and Dawson share a kiss in that season’s finale. Throughout seasons 5 and 6, Joey and Dawson struggle with the idea of being together again. In season 6, Joey and Pacey do get back together before a short time before Joey calls it off. In the series finale, which takes place 5 years after the end of season 6, Joey is again torn by Dawson and Pacey. Ultimately, though, she chooses to spend her life with Pacey.
Key Episodes: 3.1, 3.9, 3.12-3.14, 3.17-3.23, 4.1, 4.3, 4.7, 4.14, 4.16, 4.21, 4.23, 5.3, 5.23, 6.1-6.2, 6.15, 6.18, 6.21-6.24
YouTube Evidence: DC True Love Previously On…; Dawson/Joey/Pacey; Dawson, Joey, Pacey–Near To You
OTHER TRIANGLES TO CONSIDER
Dawson-Joey-Jack
Jen-Charlie-Joey
Joey-Pacey-Audrey
Joey-Dawson-Natasha
David-Jack-Professor Freeman
Jen-C.J.-Audrey
Eddie-Joey-Pacey
BONUS VIDEOS
TeenDramaWhore 
The Pacey Joey Dawson love triangle is the ultimute! Most of the time I have a clear idea of who I would want to be together, but they made them both so perfect. I used to be so DJ supportive and didn’t understand why she chose Pacey, but as I have gotten older I realise the significance of a love like PJ’s.