OCD or Pure Obession?

I was talking to some people today and they said I had a bit of OCD. They think this because my shoe laces have to have even tightness or I retie them. I order stuff from tallest to smallest. I clean my room alot so everythign is nice and tidy. I like things to be nice and straight. When I sleep my curtains have to be fully closed. Do you think this would be OCD or just an obession?