I have broken a toe and had my nose broken but I have never broken a bone that required a cast.
Never have I ever been lost and had to be rescued.

Neither have I.

Never have I ever binged watched an entire season of a show in one sitting.

Not in one sitting, neither have I.
Never have I ever enjoyed eating beef liver.

Neither have I, considering I've never had it before.

Never have I ever been in a relationship.

I have.

Never have I ever liked heights.

I don't mind the heights, but not a fan of falling from them.

Never have I ever flirted. (I don't remember if I've done this one)

I have.

Never have I ever bought a first edition book from a used bookstore.

Neither have I, I think. I don't usually check if my books are first edition or not since it doesn't matter to me.

Never have I ever drank so much that I puked.

I have...it is not fun!
Never have I ever been snowboarding.

Neither have I.

Never have I ever been roller blading.

I have! I miss rollerblading. :(

Never have I ever been able to ride successfully on a unicycle.

I can't say I've ever tried that...?

Never had I ever had a kale smoothie. Bleh.

I have not but I may try it me and my partner like kale.

Never have I ever gone streaking.

I have not.

Never have I ever smoked weed.

Neither have I.

Never have I ever sang in front of an audience

I have.

Never have I ever gone bungee jumping.

Neither have I. Heights and I do not get along well.

Never have I ever smoked.

I have. On a couple occasions.
Just cigarettes, it never stuck and I felt silly afterwards.

Never have I ever... driven a vehicle.

I have, I drive a scooter to work everyday. Also have a driver's license for a car, though I rarely drive those. Not comfortable with cars even if they're more comfortable to be in than on a scooter.

Never have I ever bought or owned one of those pillows with anime characters printed on them.

Neither have I.
Never have I ever swam in an ocean.

I have, though not very often. Haven't done so in yeeears.

Never have I ever learned to juggle.

Neither have I.
Never have I ever ridden on an elephant.

Neither have I.

Never have I ever tumbled down a flight of stairs.

Neither have I. I have slipped on stairs and fallen down sliding on my but never tumbled.

Never have I ever gone to Hash Bash.

I have no idea what Hash Bash is so...neither have I.

Never have I ever gone to a band concert.