Well to clarify rq, fursuits aren't what qualifies someone as a furry. There's a bunch of furries with no fursuit for that exact reason. A furry is just someone who takes a general interest in anthro animals (animals/creatures that stand on two legs, or generally humanoid) or just animals with human qualities.
Personally I'm a furry because it's just fun, yknow? it's such a friendly and creative community that makes it really fun and encourages people to make their own characters, invent their own species, their own lore and more. Really it's just a hobby.