Sam and Jane realized that the distance had killed their relationship.
How do they feel about it?
They are very miserable. But they know that they have to part ways.
I'm sorry that Sam and Jane's relationship didn't work out, but it's well known that long distance relationships are very difficult to maintain. It's good that they realized this and are trying to move on.
Long distance relationships are hard to maintain and often people end up being attracted to other individuals. That is why being close to someone is important to maintain a relationship.
Exactly!  It's unfortunate that you had to learn this lesson by watching someone else suffer, but hopefully it leads you to rewards relationships of your own in the future!