I can definitely help with that! Here are some lyric ideas for a bittersweet bridge that builds the tension:
Shadows long across the floor
We said it all but still want more
A quiet room, a loud goodbye...
And here's a MIDI progression you could use (Am - F - C - G/B):
🎹
Bittersweet_Bridge.mid
8 bars • 120 BPM • Am