How upsetting it is to hear that a friend is talking about you behind your back, and even more painful when it’s your BEST friend! Whenever news like this makes it back to you, you must first consider the source. It’s possible that the person that told you this might have heard it second hand or maybe didn’t relay it to you the way it really happened. In any case, you should confront your best friend.
Pray first, before you approach her, so that you will be in the right state of mind and so that you will speak God’s words. If she really is your friend, she’ll be open to listening to you. You must first confirm that she did in fact gossip (confirm the facts), and then explain how her actions have made you feel. There is no way that the situation will be resolved without honesty and communication. Proverbs 16:28 says “A perverse man stirs up dissension, and a gossip separates close friends.”
If your friend did say something about you, figure out why she might have done it, and then, you must forgive her. Luke 6:37, “Forgive and you will be forgiven.” It’s ok to take a breather from the friendship while you work through your hurt. Forgiveness is hard to do, and it may take some time, but ultimately forgiveness is what we are called to do as Christians. Remember…you are a sinner too, and may have even gossiped yourself on occasion!
Once you and your best friend work it out, it should make your relationship stronger.