If someone is being rude to you without any specific reason, you should follow these steps :
1. Give attention to that person. Show that person that you care for them and understand where they are coming from. Small gestures of kindness such as wishing them good morning and goodbye can help lift their mood.
2. Appreciate them for their efforts no matter how small they are.
3. Do not let their rude behaviour spoil the relationship. Do not resent that person, instead have a conversation with them and try to figure out the reason behind their rudeness.
4. Sometimes, it is best to avoid the rude ones completely. If you do not feel connected to that individual at all and he or she plays no role in your life, it is better to just keep them out of your thoughts and sight.
5. Check yourself. Sometimes you are the one who is rude and arrogant. The other person's rudeness can be a response to your actions. Analyse the situation well and decide what is best for you.
6. Apologise if you think that your actions are affecting the other person in any way even if your intentions are pure.
7. Just Smile every time you meet that person! This really works in calming the other person down and setting a good tone for the conversation.
If the actions of the other person remain the same over time, you must take some strong steps. To learn how to deal with difficult people in the most efficient and smart way watch Seekho’s ‘Learn How To Deal With Difficult people’ video(https://seekho.ai/series/how-to-deal-with-difficult-people/SR-131-145).