I've decided to cancel my membership.
Why do you want to cancel your membership?
I feel like it's not a place for a gym junkie like me.
It's perfectly acceptable to cancel a membership to a service that you think isn't compatible and working out for you. It's important to save money and one the best ways of doing that is to cut down on unnecessary expenses.
I just wanted to get rid of the place because I hate it.
You made a wise decision, then. You're saving money by canceling a service you don't want.