As I see it:
The first step would be to pray about the situation, humble yourself and mend the relationship between the two of you. Not only for this purpose, but because it is right. Second, be sure that your stand on the issue is backed by scripture and you know the scripture that backs it. Next, take time to reflect on areas where you can do more for your ministry and be mindful of your shortcomings so that you will be gentle, loving & restoring.
With this being said it still does not mean that the person will take it the right way, but this ensures that you did all you could to be pure in your motives and right with God.