Oh my lord that is one heck of an ending!! Great stuff!!!
Thank you for the scanlation!!
Man, this was packed with emotions, great sending off of a great manga!
I choose to believe that she planned on saying it properly on that day cos she wants to. And it is shown, that she is (still) not good at it. But I also choose to believe that she conveyed her feelings properly before.
Yes, the brunette one is Luxi's friend from middle school who also hung around her in high school. The brunette introduced Luxi to the blonde one (She actually bragged to the blonde friend about knowing the top student = Luxi).