Is this an obsession?

I go to malls every other day, or every two days. In every mall I go to, I never miss a trip to the office supplies/stationary section. I don't know what to call this, but I think its an obsession already. Every time I go out to malls, I tell myself to stop buying notepads and sketchpads, but end up buying anyways. Mom says its an obsession. I buy these things, write or draw about three times, then find another one, and forget completely about the first one. I wanna stop it, because almost half of my weekly allowances go to these. -__-