...but it's essential.
If you can do it well, it will give both you and the person you want to confront the chance to clear the air on what is causing the tension.
The only problem is that it's much more difficult to confront someone about something than it is to just bitch about them. While bitching feels good in the short term, long term it just makes you miserable (and resolves nothing).
Here's an alternative...
Before you bitch, ask the person who's upsetting you if you can speak to them about what's upsetting you. If they say yes, here's what you do:
- Take a deep breath.
- Be calm.
- Be clear.
- Be brave.
- Then tell them the truth.
It might just be the beginning of resolving the situation.