Rich McCormick Beth Van Duyne

Rep. Rich McCormick and Rep. Beth Van Duyne are no longer a congressional couple ... TMZ has learned.

Sources with direct knowledge tell TMZ ... the Georgia congressman and Texas congresswoman called it quits -- although it's unclear exactly when. However, we're told there's no bad blood between the two.

We reached out to McCormick ... who tells us, "I have a great relationship with her and will continue to strive to be the best friend I can be."