Relationship

I WAS DATING A GUY FOR 6 YEARS. AND RECENTLY MY BEST FRIEND CONFESSED ME ABOUT HI FEELINGS, AND TURNS OUT I REALLY LIKE HIM SO I BROKE UP WITH MY BOYFRIEND AND NOW IN A REALTIOSNHIP WITH MY BEST FRIEND. AND RECENTLY I AM FEELING GUILTY ABOUT WHAT I HAVE DONE WITH MY 6 YR RELATIONSHIP AND I KIND OF HAVE A DOUBLE MIND. ITS MESSING ME UP ABOUT WHAT SHOULD I DO.