What does a lonely Christmas mean?

This is the lyrics of Eason Chan's Lonely Christmas (Chinese name Christmas Knot).

Merry Christmas Merry Christmas Lonely Christmas

I want to express my heart in the waves.

But you just want a joke.

Merry Christmas alone. Merry Christmas.

The lighting must be removed tomorrow.

It was just a moment of cheering.

Who can kiss me?

Prove with my lips that I am happy.

The snow on my head wants to fall on my shoulder.

Don't go to the end?