I must have already logged out by then, Cyn. I could have guessed it without the extra lines.
It's a great song about memories, and longing for what you had. I liked it then, but I like it even more now. Thanks for posting it.
It's I Wanna Go Back, by Eddie Money.
Nostalgia also reigned supreme in this 1972 song. I'm not sure whether the one-line hint will make it easy or difficult, but I feel safe in saying most everyone knows it, on both sides of the Atlantic (it was #1 US, and #2 UK):
But that's not how it used to be