Anh thích ở bên cạnh em.
sth has not been resolved, finished or answered yet. It's usually referred to a plan or a decision that has not been decided or being uncertain.
I think I can do it quickly, but the exact schedule is still up in the air.
Over travel plans are up in the air.
for the same reason; in the similar way
By the same token, we should be willing to compromise as well.
destroy by tearing
She tore up the letter angrily.
Say this to show a better choice
A: "Should we go now?"
B: "No. There's too much traffic now. We're better off going later."
A: "The train takes three hours. The bus takes five hours."
B: "Then I'm better off taking the train."