Jessica Simpson Looking So Cute IN Black

though we may never know the true reasons behind Jessica Simpson and Tony Romo's failed romance, recent reports tell that it may have something to do with the "Do You Know" damsel's partying ways.

According to a FOX News source, the Cowboys quarterback's pals had been urging him to break things off so he could focus on his professional career.

"Jessica would get really drunk and obnoxious, it was out of control. She would be sprawled everywhere with he head on his lap and the look on Tony's face said it all," the insider tells FOX.

"He was so embarrassed in front of all the guys and his teammates were really harsh on him over it. Breaking up was a really hard decision for Tony to make."

Adding that Romo really wanted things to work out, the source says that he "fought for her with his friends, but in the end, it got to a point where it just didn't make sense for him to stay in the relationship."