日本語 Japanese Ask Questions Thread 8

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英語でも日本語でもOK
日本の方からのご協力も大歓迎です

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I'm confused with 「俺の分のお茶は自分で勝手に注げば良いようになっているのは良いとして。」 sentence, by 自分 here means 咲 or 俺 ?  Thank you!

言っても仕方の無い事だ。俺は咲の横に腰を下ろして買ってきたおにぎりに手を伸ばす。
咲も不満な表情を俺に向きながらも、サンドイッチを手に取ってラップを剥き始める。
俺の分のお茶は自分で勝手に注げば良いようになっているのは良いとして。

>>125
まかせたい　is 任まかせ＋たい　and means "I want to entrust...". You can read more about たい　for example here: http://www.renshuu.org/index.php?id=5&page=grammar/individual

実は means "as a matter of fact; by the way"
For example 実はそれはただのうわさだったよ - Actually, it was only a rumor.
実は(Actually) それは(it) ただのうわさだったよ(was only a rumor)。

And に in あなたに shows that the speaker wants to entrust it to あなた(you), so basically here に denotes an animate object（あなた）    

Of course I can be incorrect somewhere, so if something is looks wrong correct me please.