(It's okay if you do. Even mature adults are finding it financially beneficial to share expenses with their parents. Give the impression that you made a responsible financial decision.)
Yes, I moved back in with my parents after I discovered that more than half my net income was being used to pay for rent and utilities. We have an economic arrangement that allows me to save for my future, while I'm around to help them maintain our home. We all benefit, and we have been able to develop a strong friendship as three adults.