How do you feel when your talking and that person isn't listening?

I think it is very important to listen carefully when someone is speaking , and this is important because when the speaker is telling you something you should pay attention so you could learn and know what they are talking about . Lets say your talking to your brother about a problem at school and hes not listening how would you feel ? That's how the speaker feels when you are paying no mind to him/her at all . Always listen and pay attention when someone is speaking .