For me, initially Love Song sounded very refreshing with a retro feel to it and I thought this album lead song will be yet another masterpiece, BUT as the song went on it began to sound very repetitive and then mood was just stagnant for the last three quarter of it.
It had potential, though

Maybe a 7 out of 10?
EDIT: Okay, after reading the lyrics, maybe a 8.5 at least and I can definitely hear the similarity between this and Last Angel during the guitar moments