The poem is about the end of a relationship, though it never says exactly how it ended. The speaker lists what Maria used to be: someone present through good days and bad, someone who could make them laugh and make them cry. The repeated "you were there" works like a litany, a slow remembering of everything she meant.
Then the last line breaks the pattern. "Now you are just someone who was there." The word "just" is the sting. Someone who once filled every kind of day has shrunk into a past-tense fact. The poem doesn't say whether she left, drifted away, or died, so the loss stays open, and the reader feels the speaker's numbness more than any clear anger or grief.
The mood is quiet, bare, and sad. The short lines and wide gaps on the page feel like pauses for breath, or for memory. The speaker seems to be admitting that closeness can turn into distance, and that this is hard to say out loud.