Late at night, the speaker lies in bed, upset about a relationship that has changed. It seems to be a close friendship, though the poem never says exactly who "you" is. Once it was "me and you against the world," and they are still "thick as thieves," but now the speaker struggles with how the other person behaves, and with what that behavior pushes the speaker to do, like smoking to calm down.
The central image is weather. The speaker's tears are "my personal rain," and the sadness is a "silent storm." Everything happens quietly, because the speaker doesn't want to wake a roommate or call the other person and say what they feel. That restraint makes the mood lonely and tense. The ending offers no resolution. As the storm shrinks to a drizzle, the speaker pushes the questions away, admitting this has happened before and will happen again. The tone is weary and resigned, more than angry.