Joe Jonas and Taylor Swift Split

Joe Jonas and Taylor Swift have ended their romance, according to reports.

The pair -- Joe, 19, and Taylor, 18 -- had dated for several months.

They split at the beginning of this month (October), with Joe ending the relationship with her over the phone.

A source says, "He broke her heart."

Another added, "He dumped her because of his crazy work schedule and because he had pressure from his family to stay single in order to further his career.

"Taylor was falling in love with him, and it was getting too serious, too quickly for him."

The country star and the Jonas Brothers singer never confirmed their relationship.

"He's an amazing guy, and anyone would be lucky to be dating him," she told reporters at the MTV Video Music Awards last month.

Reps for both stars declined comment.