I always thought this song should be darker, so I found some chords that may be a good fit. It's only a brief and very sloppy example, but let me know what you think of the basic approach (if you can get past the horrible vocal and guitar playing...LOL).

Our Last Kiss

Thanks

To "90s it up a bit" add simple drums and slight bit of bass and if you want some whining lead guitar in a solo break. You don't need chords.