"He was a good friend of mine, a close buddy. I will miss him."
Does the underlined part give us more detail about what type/kind of friend?
The term "(close) buddy" is quite common in Aust/NZ. People may have a number of good friends but usually very few close buddies. It suggests a more personal and relaxed relationship between people who have similar interests and enjoyments in life and happily spend a lot time together. As emsr2d2 says, it normally refers to men, but I have heard women and girls use it with the same meaning.