^ Agreed.
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I asked my friend, a VERY trusted translator who does almost all of the Bleach spoiler translations, sheetz, had this to say on the matter (he's been studying Japanese for the past 3 or 4 years):
Here you go. The "I love you" parts definitely seem romantic.
Page One (of the RAW):
頭では理解できても、感情を抑えられないひまわり。 直接逢えない四月一日への想いが、溢れ出る。
Even though Himawari can understand it in her head, she's unable to hold back her emotions. Her feelings overflow to Watanuki, who is unable to meet her in person.
Page Three (of the RAW)
・・・・大好きだよ 四月一日君
....I love you, Watanuki-kun.
おれもひまわりちゃんが大好きだよ
I love you too, Mawari-chan.
Page 9 (of the RAW):
そうだ
That's right.
百目鬼その時、一緒にいたのか
At the time was Doumeki with her?
後で九軒に聞いた
I heard it from Kunogi afterwards.
直接会えるのが一年に一度なら
If she'll only be able to meet that other guy in person once per year
その他のあいつの事を出来るだけ知らせて欲しいと頼まれた
She asked me to let her know as much as possible about him.
そうか
Really?
九軒はあいつを大切にしている
Kunogi really cares for that guy.
四月一日もだ
Watanuki, too.
少しでも店がひまわりにとって良い状態になるように
覚えた術も全部使ってずっと頑張ってる
He's still working hard, using all the techniques he's learned,
in order to make the store even just a little better for her.
So, I don't think it seemed plantonic at all. There have been countless anime's and mangas where when the guy or girl says "daisuke" meaning that they love them and/or want to date them. And considering that Watanuki already has confessed to Himawari {LINK} and how Himawari began to open up A LOT more to him after she took on his scars...and when he technically asked her out on a date {LINK} {LINK}, I think it was pretty obvious this was going to happen eventually.
Himawari is the one Watanuki loves. It started as a HUGE crush, then as he matured, it turned to love. Because of Himawari opening herself up more to him, she realized she cared for him too.
Maybe you guys missed the side text on the first page?
cnet128 said:
Himawari understands the situation, but cannot keep her feelings suppressed. Though she cannot see Watanuki directly, her feelings for him are overflowing.
http://mangahelpers.com/t/cnet128/releases/19860
Himawari makes Watanuki the happiest. And I think is very obvious he wants to be the one to make Himawari the happiest, and he’s happiest when he is making her happy. So…Himawari is his happiness, and after all the mud he’s had to trek through his entire life, he deserves his happiness.
And even Yuko said in chapter 13 of english volume 2, regarding Watanuki and Doumeki:
"I said connection. It' doesn't have to mean love"
*Shrug*