Here is my first Riley riddle. hope you like it!
My prefix has a six-pack,
My infix would be you in Turkey,
My suffix thinks: "Nice - I am very.",
And altogether I am not there.
Absent or absentee, New Guess: Absence
Abs , six pack abs
Sen , its literally you in Turkish language.
Still not sure, maybe nce, nice, minus the i (as in varies by an I)
Last line & Title-
gone away and not here both refers to absence.