Porter was found dead in her Los Angeles home Thursday at age 47.
“For the last three days I’ve been trying to wake up out of this nightmare. But I haven’t,” Diddy wrote in an Instagram post Sunday, according to Vibe. “I don’t know what I’m going to do without you baby. I miss you so much. Today I’m going to pay tribute to you, I’m going to try and find the words to explain our unexplainable relationship. We were more than best friends, we were more than soulmates. WE WERE SOME OTHER (expletive)!! And I miss you so much. Super Black Love.”
The caption was posted along with video from the couple’s December 2006 Essence magazine photo shoot. The video showed Porter, who was pregnant at the time with their twin girls Jessie James and D'Lila Star Combs.
The music mogul dated the actress and former model off and on for 13 years, ending their relationship for good in 2007. The pair notably remained friendly after their breakup, supporting each other at events and appearing together at family events.
A cause of death has not yet been announced.