It is very easy to get mad at someone and end the relationship. To never want to talk with them or trust them again. It is difficult to have a rupture in a relationship and then be willing to work on re-building the relationship, whether it is romantic, friendship or business!
You may be asking yourself but why would you want to? Well, if this someone that will continue to be in your life and that you will have to continue to have contact with, you will need to do a bit of repair. Even if the relationship is not completely where it was prior to the issue, it may be necessary to do some of the uncomfortable work.
So, then how do you do this Ask yourself how much of the rupture was your responsibility. Be honest when you evaluate this. Own it. Then apologize for your part. Ask the person with whom you had the issue what do they need to be able to get along again. Be aware of what you need to be more comfortable with this person. See if the two of you can create a plan that allows you to lessen the stress.
This will not be easy. In fact, it will be very uncomfortable. However, the end result may be a situation that is much more tolerable for all! It may be scary, but it may be worth it!