Sorry Thomas, I didn’t believe you, but you were telling the truth.
すまないトーマス、君を信じるべきだった
I’m trying to figure out which school is the best to me in a vacuum.
純粋にどっちの学校がいいか比較したい
In a vacuum = existing completely separately from other people or things and having no connection with them
I just don’t wanna start the war with her.
彼女とモメたくない
What about Thomas’s found out? トーマスにバレたらどうするの?
Last time, Thomas punched him on his face.
前回トーマスは彼を殴ったからねえ…