What does the word "tears" refer to in this lyric?

Native speaker’s answer
Rebecca
"This year, to save me from tears" basically means that differently from last year, the singer doesn't wish to get hurt (and cry). Thus, he has decided to give his love (his heart) to someone who is worthy of it. It's not really a very commonly used expression as it's quite metaphorical/poetic in nature, but it fits well in the context of love songs.