Overthinking is not a character flaw. It is an attachment system doing threat detection on ambiguous data. A short reply, a missing emoji, a slower response time: your brain fills the gap with the worst story it knows, then rereads the thread hunting for evidence.
The cruel part is that rereading never resolves it, because the message does not contain the answer to "are we ok." You need a different read, not a twelfth pass.
