To help you get beyond those emotions that get in the way of solving the problem. Talk to that person. Step out of any triangles that have formed around this problem. We do this to lower the emotional intensity in the original pair directly involved. This pattern is called an interpersonal triangle.
Triangles can take many forms.
On a transient basis, triangles operate automatically and unconsciously in all human contexts, including the workplace. If you can refuse to participate in triangles, you will be making a significant step toward the successful resolution of your problem. This could mean not participating in gossip. If someone complains to you about another person, you can listen, but without blaming or taking sides. Stay neutral on the issue.