Actress Sofia Vergara allegedly felt her ex-fiance Nick Loeb "used" her fame to boost his own business and felt "really embarrassed" by his actions.

The `Modern Family` star confirmed she had called off her two-year engagement last weekend, blaming their busy schedules. But she reportedly ended their romance because she thought Loeb was trying to take advantage of her fame, reports contactmusic.com. "It really embarrassed Sofia,` a source told Us Weekly magazine.

Another source told the New York Daily News: "He's always trying to use her success to make himself successful. I think she's finally started to see him as the opportunist he really is."