Nah, you don't need a fursuit or any fancy stuff to be a Furry, that's just a bonus. And you aren't any less of a Furry if you don't have one.
(the fact is, most of us actually can't afford a fursuit! :D *cries*)
Really all being a Furry means is that you take a general interest in anthropomorphic animal characters.
No extra stuff required!
(and it's completely your choice to be a Furry; there are some who do have an interest in anthro animal characters, but don't consider themselves Furries, and that is okay!)