What is the English translation of the letter (written in Japanese) in Anohana: The Movie? So I began watching Anohana: The Movie after completing the series. In the movie, there's this scene where Anaru is writing a letter to Menma. Unfortunately, the contents of the letter are left untranslated. Can someone please tell me what Anaru wrote in the letter? 

Here is the screenshot of the letter:
Transcript:


  めんまに[謝]{あやま}りたいから、お[願]{ねが}い[叶]{かな}えようって[思]{おも}ってた 
  I want to apologize to Menma, so I think my wish has been granted.
  
  いつからか... いつからか、[私]{わたし}...　じんたいが[好]{す}き 
  Since when... Since (who knows) when... I fell in love with Jintai.


いつからか means “since some time or another; since who-knows-when”, but I am not very sure how to put it to make it sound natural in English.