回答
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I'm having so much fun to that point that it's scary
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I'm nervous about how perfect my life has been recently
I'm having so much fun to that point that it's scary=とても楽しいが故に怖い
〜to the point that〜 =〜が故に〜
楽しすぎて逆に怖い、と言うニュアンスです。
I'm nervous about how perfect my life has been recently=近頃人生が完璧すぎて何だか落ち着かない
nervous=緊張した状態
recently=近頃