Anthony Barr says he has LOVED his time in Minnesota ... but the superstar LB admits his Vikings career might be over -- telling TMZ Sports, "My possibilities are open."

A.B.'s had a stellar past 5 seasons with the NFC North squad ... starting 71 games and earning 4 Pro Bowl selections.

But, Barr's set to be a free agent in a couple weeks ... and tells us he could actually see himself in another uniform next season.

"I love Minnesota, but I'm willing to play anywhere I find fit."