気(き)になるto be on one's mind, to worry one, to care about, to be bothered by, to feel uneasy, to be anxious, to be curious about, to feel like, to feel inclined to, to fancy, to like, to catch one's eye

僕(ぼく)は多少(たしょう)の雑音(ざつおん)はあまり気(き)になりません。

I don't really care about a bit of background noise. {to be on one's mind, to worry one, to care about, to be bothered by, to feel uneasy, to be anxious, to be curious about, to feel like, to feel inclined to, to fancy, to like, to catch one's eye}

明日(あした)の天気(てんき)が気(き)になるので天気(てんき)予報(よほう)を調(しら)べました。

I was curious about tomorrow's weather so I checked the weather forecast. {to be on one's mind, to worry one, to care about, to be bothered by, to feel uneasy, to be anxious, to be curious about, to feel like, to feel inclined to, to fancy, to like, to catch one's eye}

生(い)き別(わか)れた姉(あね)がどうしているのかが気(き)になっています。

I am worried about how my estranged sister is doing. {to be on one's mind, to worry one, to care about, to be bothered by, to feel uneasy, to be anxious, to be curious about, to feel like, to feel inclined to, to fancy, to like, to catch one's eye}

最近(さいきん)あの店(みせ)が少(すこ)し気(き)になっているが、なかなか行(い)く勇気(ゆうき)が出(で)ないでいる。

I've been a bit curious about that store recently, but I just can't muster up the courage to go. {to be on one's mind, to worry one, to care about, to be bothered by, to feel uneasy, to be anxious, to be curious about, to feel like, to feel inclined to, to fancy, to like, to catch one's eye}

歩(ある)くたびに股関節(こかんせつ)あたりの痛(いた)みが気(き)になりますが、病院(びょういん)に行(い)くには及(およ)ばない。

Every time I walk, I'm bothered by a pain around my hip joint, but it's not serious enough to go to the hospital. {to be on one's mind, to worry one, to care about, to be bothered by, to feel uneasy, to be anxious, to be curious about, to feel like, to feel inclined to, to fancy, to like, to catch one's eye}