My friends simply don't care...
In the past I've actually tried to befriend some furries on TF2, but they were for some reason all the really weird obnoxious fetish-sex crazed types of furries, and besides that, really toxic players...
It kinda became a meme pretty quickly, and now that's just their rock-solid impression of furries.
They don't care if someone's a furry or not, they just don't want to get involved with it, they don't want to hear about it, and they don't even care for an explaination on that being a furry is in itself not a sex thing.
They don't know that I'm a furry though. They just know that I like animals a lot. I think I'd like to keep it that way, atleast untill they'd let me explain that it's not a sex-thing... >_>