Having an interest in something with 気がある
The expression 気がある literally means “to have a feeling” or “to have interest”. It is often used in contexts where someone has romantic or personal interest in another person or a strong inclination toward something. It is often used to describe subtle, underlying feelings rather than overt declarations.
Dictionary Definition
1 意志・意欲がある。
2 興味や関心がある。特に、恋い慕う気持ちがある。
1) There is intent/desire.
2) There is interest (in something). Particularly, a feeling of yearning.
Goo Dictionary
Examples
Interested in him with 気がある

Makoto and her family head out on a trip to the river. When they stop to pick up Kei’s friend Nao, Akane greets her with, “Howdy, Kei’s girlfriend!” Nao tells her she’s wrong.
- 圭:
- 「よっオレのカノジョ」
- “Yo, my girlfriend.”
- なお:
- 「やめてよ」
- “Stop that!”
- 茜:
- 「と言いつつ気があったりするんでしょ?」
- “Although you say that, you're interested in him, aren't you?”