I told my parents that I believed in Santa long after I stopped believing so I could continue getting presents.
Do you feel okay about lying to them?
No, because it made them happy to buy me presents.
You were being bad by getting presents with lies. You shouldn't have been lying, especially not to your parents.
I feel bad now, I don't do it anymore.
I'm glad you don't do it anymore, but it's still bad that you did it in the past. It's wrong to try and get presents in a fraudulent way.