Meaning: People's hearts were beating, and their love for each other was growing stronger.
Choice of Words: Hearts are the center of our emotions, and when they beat, it means we're alive. "Beat" is the present tense of "beat." Love is a deep feeling of affection and care for someone, and when it blooms anew, it means it's starting to grow again. "Bloomed anew" is a phrase that means to start growing again.