I'm offended that a new person in our friend group did not follow me back on instagram and subsequently decided to unfollow them.
Why would that make you so offended?
I have only followed them out of respect.
I think that is reasonable if there was some implicit or explicit agreement. If someone isn't treating you well, it's okay to want to get away from them.
Shit this is bullshit, I'm not unfollowing them. Have a good one!
Well I hope that means everything worked out for you!