It's a song about thinking about someone you miss who you still have romantic feelings for (maybe an ex, maybe just someone you'd wanted to be with). "Wonder Years" is a reference to the 1980s (set in 1960s) sitcom, one of the big themes of the series was the nostalgically depicted romance between Kevin and Winnie which didn't work out.
It's a song about thinking about someone you miss who you still have romantic feelings for (maybe an ex, maybe just someone you'd wanted to be with). "Wonder Years" is a reference to the 1980s (set in 1960s) sitcom, one of the big themes of the series was the nostalgically depicted romance between Kevin and Winnie which didn't work out.