Can you fall in love with someone else when you are already in relationship?

Does it happen? Is it cheating? If you are already in a relationship is it possible to fall for someone else does this count as cheating even if you are just talking and have romantic interest for them? Or does only physical involvement is considered as cheating? Why does this happen? Does this have something to do with the relationship you already are in or is it just the person's nature.

Can you fall in love with someone else when you are already in relationship?
Post Opinion