Your parents are thinking, "We can't go on, but there is a child studying!" " ! Not yet. When the children graduate from college, they will be separated when they grow up. "Maybe they think so every time they quarrel. Maybe they even tell each other that they will be separated when their children graduate." Of course, this is just a guess.
You don't have to feel that you are dragging your parents down. Why did you drag them down? They love you, love you very much, and think it's not good that the family is incomplete when the children are studying, so they always protect you until you grow up. They are doing their best and feel that their responsibility is none of your business. ...
Maybe your initial goal has been to make your family better, so you don't think it's that important now. Love but, son, believe me, there is nothing wrong with your unhappiness now. You'll be fine again.