Do you think you can tell if someone is in love just by how they look at another person?

yes

Explanation:

I think you can because whenever people think of somebody they love their pupils dilate. And their faces just light up and get happier. And they may claim not to love them but they do. They may not know it yet, but they do.

1.the hosts on two opposing mountains stood,  

2.thick as the foliage of the waving wood;  

3.between them an extensive valley lay,  

4.o'er which the gleaming armour pour'd the day,  

5.when from the camp of the philistine foes,

6. dreadful to view, a mighty warrior rose; in the dire deeds of bleeding battle skill'd,

sorry but whats the question?