What does it mean when a guy sends you a song?

It’s a guy I’d had a crush on in middle and high school, but he didn’t feel the same; he’d actually started ignoring me me for a whole other crowd after I told him how I felt. I’m in college now and he recently sent me a friend request. I went on and accepted it (which I regret now…) and he started messaging me. We talked for a bit about school and stuff, and then he starting flattering me telling what a nice person I am, basically telling me his whole life plans… then after some more talking he sent me a kissy face emoji and a blushing emoji. And we weren’t even talking about music at all when he randomly sent me a youtube video link to a song called “Only in My Dreams” by some dude named Ariel Pink. Some of the lyrics are, “if at first you don’t succeed at love just dream a little dream about a girl so real… if only in my dreams she’ll be right here next to me…‘cause you’re the one in love… if only in my dreams you’re the luckiest girl in the world”. It would be very sweet, if I still liked him. But I don’t…