By repaying them the same way they have treated you. After all, they're folks just like you, with needs.

They say that our happiness is of great importance, forgetting about what they need to stay sane in the whole parenting game.

I buy them things, I know from research, what they want. Ask them.

My mother is not as simple to read as my father. He holds in a lot. Bipolar or not, I should try better to be friends, not just a son.