Aww, it's a sad scene, the farewell. It's from Nathan's last episode (14-2-97).
Before Nathan left the soap, Joey rebounded straight into the arms of Dorian’s niece, Kelly. But things ended for that soapy pair in 1997 when he took off on another study-abroad trip, this time to Paris — and on Valentine’s Day, no less.
A little addition:
In Michael Malone’s absence, the storyline spiraled out of control. New storylines such as Dorian writing a romance novel based on her affair with Joey (with Viki cast as the villainess) seemed ridiculous. Numerous core actors fled the show; Nathan Fillion (Joey), Tonja Walker (Alex), Jon Loprieno (Cord), and Stephanie Williams (Sheila) all left the show in 1996. Kamar De Los Reyes and Wendee Pratt, who played the enormously popular supercouple Antonio and Andy, left in '97. Susan Haskell and Thorsten Kaye (Marty and Patrick) also departed that year.