There isn't anyone wonderful in my life to steal my heart away.
ーThere isn't anyone wonderful in my life right now to steal my heart away.
「今、私の心を奪う素敵な人が誰もいない。」
steal my heart away で「私の心を奪う・つかむ」
ーI haven't met anyone that I could really fall in love with yet.
「本当に恋に落ちることができる人にまだ出会えていない。」
fall in love with で「恋に落ちる・惚れる」
ご参考まで!