You'll be in university soon. Moving out and getting some space to prepare for that might help.

[ It's an excuse, a blatant one, but it was good enough. No one outside the family would question it]

Most teenagers are supposed to have a proper rebellious period, aren't they?

[ a soft pause]

...If you keep having to stay in the same space when no one can even look at each other, nothing will ever work out.