How to develop emotional detachment and not be rude?

Setting boundaries is important. People often have a confused perception of the difference between assertiveness and being rude. Letting those around you know what your expectations are isn't being rude, it's being assertive. Let them know in a controlled and calm manner and make sure that your expectations are reasonable in the first place!

Try not to to bring yourself into the conversation. Don't use words like I or me or refer to personal experiences. You're here to talk about them.

I've had to do this a number of times in my life as a result of growing up with very damaging relationships. The important thing to do is take a step back and decide your truth. Separate yourself from hate, resentment, anger, or any negative feelings and say to yourself, "this person has a side of the story too that is equal in value to mine." Then, when the opportunity for interaction occurs, you are able to communicate kindly and respectfully, but also being aware of yourself and doing what is best for you, which is detaching yourself from them. Basically it's a mindset thing. Don't worry so much about how you will act. Change how you see the person and you will act rightly.

Just be honest and open but make sure you think before you talk. Think of how it would feel if someone said the same thing to you to prevent being rude.

There is a fine line between being cold and sortof unattached when someone reaches out to you for help. Ways that you can establish emotional detachment in your conversation would be to re-state what the guest is saying in a more objective tone, but then always concluding with a positive, uplifting manner. This shows the guest that you're there to listen to them and help them reflect on their own thoughts in a positive light.

Keep the conversation in a professional yet positive tone. If any line is crossed, reinforce the boundaries by voicing that you are here to help them.

Take a deep breath and try to understand it from the other person's perspective. Maybe they are sick and suffering and this behavior is a result of their illness

Try to understand it from other people's perspective and try to conclude positive to show a guest that you are here to help him.

Take a deep breath or go take a walk etc to calm you. A good way is to express emotions or feelings is to write your them down in a journal if you struggle with verbally expressing feelings

Depending how the person you want to be less attached to you handles their own attachments, it may be hard or impossible to loosen your relationship with them them feeling hurt. However, you have every right to back away from a relationship. For some relationships, it may be simplest to just stop spending time with them as often. Some relationships need to be more direct, and you may need to ask for more time or space.