The Modern Family star announced the split herself.
"Not that anyone should care, but in order to not give the press the chance to invent crazy and hurtful drama, I prefer to tell my fans personally that Nick and I have decided to be apart," Sofia wrote. "We have been having too many problems with figuring out how to spend time together and because of my work and now his, it's been getting worse and worse, not fun anymore. We are still very close but we believe it's the best thing for us right now," she wrote on her Whosay page.
Vergara and Loeb began dating four years ago. They split in 2012, reconciled and became engaged. Their wedding is now off, at least for now.