"Untitled (How Could This Happen to Me?)" is a song by Simple Plan. It was released in 2005 and is part of their album "Still Not Getting Any...". The song is about someone who was in a fatal accident and is dying. The lyrics are about what the person is thinking and feeling as they die. The chorus goes "How could this happen to me? I've made my mistakes. Got nowhere to run. The night goes on as I'm fading away."
I found a guitar tutorial on GuitarTricks.com that teaches how to play the song. It includes strumming the verse and also a finger-picked approach. They also teach these two approaches in the pre-chorus. The tutorial includes 10 videos and 8 score files.