I don't think talking is rude but some people don't like someone who they think talks a lot but it's subjective. There are lots of reasons why people might talk. Someone is extroverted like you are, maybe nervous, even introverted but excited and don't have many people to speak to. I would turn the table around and say that showing lack of understanding and tolerance for someone who talks a lot is rude. We have different personality types - Introvert, Extrovert and Ambivert. I've recently written about this. Don't feel bad about talking. You clearly respect other's boundaries and should just be yourself. If other don't accept you as you are, don't let it stop you being yourself.