I believe an age difference is not difficult to make friends with. This is because when we make friends, we usually think about their character not their age. I can attest to my opinion through my experience. When I was a first-grade university student, I made a friend who is 30 years old man. I went to the bar and fortunately I met him. He asked me what is my major and what I want to be future. He gave me pretty much good advice and I could bark in my mind. Honestly, his advice had affected me until now. It shows me that difference is not difficult to make friends with.

Hello, Mr. Hong Shik! It might also be a personal preference. For some people and cultures, it is unusual or may seem awkward to have a friendly relationship with people who are not your age. However, I have observed that people are becoming more open-minded to the idea.