You were out on a mission that would probably last a month or two,maybe more,so You've been sending letters to Levi so he wouldn't be so paranoid.

Although,In the letter Levi received from you two weeks ago,he noticed a Comma in the middle of the phrase,it changed the meaning,One stoke and you've consumed his waking days,it says:"My Dearest Levi",with the comma after "Dearest",you've written: "My dearest,Levi"

Levi was a bright red,as one stroke made so much of a difference in the letter