Heart

The lyrics describe someone who feels an intense, repeated rush of emotion whenever they see the person they love. Their feelings become a direct confession: they say they are in love and mean it, though they also suggest the other person may not understand how important the relationship feels to them. The repeated refrain gives the song an excited, almost breathless mood.

“Chain reaction” compares the feeling to one event setting off another: seeing the loved one triggers a strong response. “My heart starts missing a beat” is not meant literally; it describes excitement or nervousness so powerful that the speaker feels their heartbeat change. Hearing the other person’s heartbeat “next to me” suggests physical closeness and intimacy.

The speaker wonders, “Can you feel it too?”, so the song leaves open whether the attraction is mutual. Their repeated declaration sounds certain, but “you don’t know what it means to be with you” may express frustration, vulnerability, or simply the difficulty of explaining a powerful feeling. The lyrics focus on the speaker’s experience rather than telling us what the other person thinks.