OK, back to the 70's: This '74 crossover composition was Jimmy Buffett's first Top 40 hit, peaking at #30 Billboard Hot 100, #3 Easy Listening and #58 Country. He dedicated it to his wife - missing her and his family while on tour and looking forward to being reunited. Part of his "Big 8" songs that he performs in every concert.
Yesterday's answer: "That's Life (That's Tough)" by Gabriel and The Angels. A toughie with help from my dear sister Gina.