The speaker describes being completely caught up in someone who has no idea how much control he has. When he doesn't talk to her, she is sad all day and cries herself to sleep at night. She also says she hurts herself on those days, which is the most serious thing in the poem and is stated as plainly as everything else.
The twist comes at the end. Being apart hurts, but being together doesn't fix anything: "every day we are together it gets worse." The repeated "and worse" slows the poem down and makes the spiral feel unstoppable, as if there's no good option left. Whether he's silent or present, she ends up in more pain.
The mood is raw and hopeless. There's no fancy imagery, just short, flat statements, lowercase and unpunctuated, like someone typing out feelings without trying to make them pretty. That bluntness makes it feel honest and urgent. If a poem like this feels close to your own life, talking to someone you trust can really help.