Oh yeah, i get that but think of it this way:
Do you watch Star Trek? Star Wars? Do you play Pokemon? Whatever fandom you may have, do you have any friends or family that don't particularly like the same thing? i'm sure you can think of one. When you're around like-minded friends, you can make jokes and talk about the fandoms you have in common. if your friends are close enough to you then you should be able to gauge how they might react to your furriness. Just like how you don't talk Minecraft with your mom, you shouldn't expect to chat furry stuff with some (or most) of your friends. You don't have to "keep things separate". Just gauge your friends' reactions to casual commentary on subjects like cartoons, fiction, etc. to see if they react positively or negatively to furry culture, assuming they even know it exists. if they engage or seem open to it, roll with it. if they aren't or have some shit opinions, then back down. -And if a hobby is enough to break off a friendship, then fuck 'em! (no, not literally, just get new friends) :V
if being a furry is so important to you (and i mean this in general) that you truly feel the need to "come out" as one to friends and family, then you (again, generalizations) have a problem beyond being a furry.
That said: i know that's not what you were asking.
it's just that we get those kinds of threads soooooo verily often... -And for what it's worth, i DO have friends who aren't into furries and some even despise them but we're still friends. Just because i have a separate hobby from theirs doesn't mean we can't get along. Even if it doesn't peke their interests, they know it does mine so on occasion they might bring it up. Sure, they might bring it up and jab at me for it but it's healthy to laugh at yourself. i do it daily...and yes, even about furry stuff.
[/rant]