This is the REAL Bumbleberry shipsong. I've known this song for around 2 - 3 years now, and I still love it, I always have, and it's one of my favourite songs. It's by Evanescence, and the reason why I hesitated and put Heidi Tate's song as their shipsong is because I thought is was just another stupid breakup song (WAY too many songs are about love and breakups these days and it makes me mad). But my mum heard the song and really loved it, so she delved in deeper and apparently, the song isn't actually all I thought it was. In fact, it wasn't "another stupid breakup song" at all.
This song is about two people - a boy and a girl - who both love each other and knew that they'd die for each other in a heartbeat, but they never actually really admitted it to each other. Then the boy dies, and the girl mourns about never telling him she loved him. I love this song and it has found a place in my heart.
This is so clearly Bumblewind and Dewberry's true shipsong. Here are the lyrics: