Misunderstandings and differences of opinion are normal in friendships and to be expected. There’s no need to end a relationship because of them. However, you and your pal need to communicate about the situation rather than acting as if it never happened. If you don’t clear the air, resentment and mistrust will build between you.
You need to understand one another’s point of you. Did she think you were a snitch while you thought you were merely handling business? You may not agree with one another. More importantly, though, both of you will have an opportunity to express your point of view and be heard. Your bond will grow stronger from maneuvering such a tricky situation with mutual respect.
I only recommend terminating a friendship when there is a long-time pattern of bad behavior or when the pals no longer have morals and values in common. If this sort of behavior continues, then it may be time to re-evaluate the relationship. For now, though, keep talking about the things that matter, enjoying each other’s company, and remembering that a good friendship is a precious thing.