"Su amigo Pedro" means "his/her friend, Pedro"
My good friend is "Mi buen amigo" for a guy and "Mi buena amiga" for a girl. Normally adjectives come after the word. In this case, that would make your friends good as opposed to bad. And that's not the sense of what you want to convey.
Su / tu / vuestro (a) mi mejor amigo (a) = Your best friendyour my best friend (an illogical sentence)If you meant: 'You're (= you are) my best friend' - Es / eres mi mejor amigo (a)
La unica chica para mik = The only girl for me su amigo = his/her/your (male) friend sabes que estoy hablando = know what I'm saying
Possession in Spanish is indicated with the word "de." "de mi amigo" -- my friend's "de su amigo" -- his friend's, her friend's "de tu amigo" -- your friend's
Amigo/a tuyo. Su amigo/a. Tu amigo/a
Su nombre es Morgan York mi amigo, y es una preciosa niña que,si bien creo, tambien tu piensas k es hermosa.
Tu amigo or su amigo
alto verde
More polite:Quisiera ser su / tu / vuestro (a) amigo (a).Also possible, but more direct:Quiero ser su / tu / vuestro (a) amigo (a).
Mi means "my" and "su tipo" means his or her style or type
esta es su amigo