Who were all of Phoebes boyfriends on Friends?

Mike Hannigan David Phoebe Buffay/Significant others

Why did Joanna get killed off in friends?

Joanna. Rachels decision to quit waitressing at Central Perk gave her the courage to finally pursue a career in fashion. She learned that Joanna made derogatory statements to jeopardize her career; this led to her almost quitting until she was offered a promotion to become an assistant buyer.

What happened to Mike in friends?

They met in the season 9 episode, The One With The Pediatrician, and started dating, but broke up in The One With The Boob Job (S9E16). But they reconcile in the season 9 finale, The One In Barbados.