A woman said, I am a bug in your heart. What does that mean?

First of all, a woman said I was a bug in your heart. This may be the meaning at first. Because if he likes you, he might want to. He is like a bug in your heart. Into your heart. Then you can't get rid of it, or someone said something like I'm a worm in your heart. That is to say. He can know what you are thinking, or what you know. He's like a worm in your stomach. This should be a fact. But this sentence has a deeper meaning than bugs. There is a layer of love for you. So, that girl should have feelings for you, and he likes you.