Answer

She feels she is dead and forgotten about and that everyone left is having a good time without her ‘the sang, they jested, and they laughed.’

In stanza 3 the poet see her friends who are all still alive and there is a sense of sadness, even anger from the speaker with the line ‘I, only I had passed away’ as she feels ‘I was of yesterday’. Perhaps she is bitter to be dead and deprived of the joys of life.