After a fight, the first text doesn’t have to be perfect. “Hey, can we talk?” does most of the work.

Both people usually want it over and both are waiting for an opening that does not cost them anything. Days go by because each of you is drafting something that covers everything fairly, and the draft keeps failing, so nothing gets sent. The actual job of the first message is only to say you still want to be in this.

Send four words today rather than the right paragraph next week. Leave the arguing for the conversation itself. If they do not answer straight away, that does not mean no, and you have still moved it from stuck to open.