➌ they give you the track list and if they like, can also provide cover art and reasons for choosing the songs/lyrics (hell you could even go as far as putting it in a .zip file for them, but it's up to you)
➍ add as many or as few tracks as you like!
➎ ...perhaps, are you trying to say something with the mix? you want to be more than friends/you don't like them/you value their friendship etc.
➏ ???????
➐ enjoy and have fun!
➑ PROFIT!
➒ play nicely and respect other's song choices etc. no wank over music thank you