My boyfriend and I often quarrel and recently broke up. Is it because of the feng shui decoration where we live?

It is inevitable that two people will quarrel when they are together for a long time. Sounds like you still care about each other. I don't believe in geomantic omen. The environment will change a person's mood. I suggest that you try to keep the room clean and tidy, as long as it looks pleasing to the eye. The important thing is that you two talk together and let him know that you care about him. If you love him, you should open your heart and tolerate these trifles between you.