Multiple sources connected to The Weeknd and Selena tell TMZ, their relationship had been fizzling out since Summer. They had rarely seen each other because of his touring schedule and her shooting schedule. They started talking less frequently on the phone.
TMZ was told Abel enjoyed being single before he met Selena and felt unfairly tied down in a relationship that had lost its passion. TMZ's sources say several weeks ago Abel called Selena, explained how the relationship was no longer working for him and then ended it.
TMZ's sources say the two remain friendly and have even talked several times since the breakup.
As for Justin Bieber ... TMZ was told he was not a factor in the breakup. Justin's apparent reignited relationship with Selena didn't start until after she and The Weeknd went their separate ways.
As for Abel ... he's not sulking. He's a quick rebounder.