Fixed Width
Fixed Width
[A man, Rob, is sitting at a computer. The text is an IRC-style transcript of a conversation, in a fixed-width font. He is text-messaging a girl he slept with named Emily; their messages read as follows:]

Fixed width or monospaced font refers to the font used in old teletype terminals and some instant messaging clients (often Courier ).
For two text lines to have the same length, it's easier if they are in a monospaced font. For example, the following sentences are the same length in a monospaced font, but since we are using a proportional font , those lengths are not exact (the third line is noticeably wider):
<rob> last night was nice <emily> the best i've had <rob> yeah it was AMAZING

The title is possibly a double reference, both to a monospaced font and to lines of the same length.
Initially, by mere chance, Emily's and Rob 's lines were exactly the same length. This made Rob want to continue the pattern.
That Rob feels forced to change what he wants to type to continue the pattern could be a symptom of obsessive–compulsive disorder .
Because of the monospaced font, any reply with 19 characters (including space) would have continued the pattern. In particular, "definitely for real" or "i'm in love with you" would have worked.
In the title text Rob continues to write a sentence: "I wish I knew how to quit this so I wouldn't have to quit you." He acknowledges that he has a problem, since he cannot quit his desire to keep the fixed width. If he could have quit this desire, then he would not have had to quit Emily. But since he felt he had to keep the fixed width, he involuntarily wrote something that felt for Emily as if he quit her. And he was too late out with his apology for her to read it.
[A man, Rob, is sitting at a computer. The text is an IRC-style transcript of a conversation, in a fixed-width font. He is text-messaging a girl he slept with named Emily; their messages read as follows:]
