u/Ok-Investigator-4403

I (M, mid-20s) started a job where my best friend from years ago also works. He is now my senior at the workplace and is part of a small group of coworkers I interact with daily.

Over time, I started feeling like his behavior toward me changed. He began mocking me in front of others, bringing up personal insecurities I had previously shared with him in private, and making jokes at my expense in group settings. I often felt excluded from conversations and generally “below” the group socially.

One specific example: someone at the gym in the past had insulted me by implying I’m weak/fragile. I told my friend about it privately back then. Later at work, during a group interaction, he repeated that same phrase in front of colleagues while laughing, which caught me off guard and made me freeze and not respond.

There were also multiple smaller incidents where he corrected me in a harsh tone over minor jokes, mocked my responses in group settings, and generally made me feel embarrassed in front of coworkers. I’ve also tried to be friendly and engage normally, but I feel like I’m being stonewalled socially.

In one situation, I made a sarcastic joke in a group setting, and he immediately shut it down in a stern way. After that, his attitude toward me seemed even more distant and negative.

Recently, I’ve become very frustrated and emotionally reactive about the situation. I feel disrespected and humiliated, and I’ve started thinking I need to distance myself from him completely and focus on my work and leaving the job eventually.

At the same time, I’m wondering if I might be overreacting or being too sensitive, especially since workplace dynamics and hierarchy have changed between us.

AITA for how I’m reacting and for wanting to cut him off completely?

Quick note this was summarized with AI, so a few details that are missing is that initially i was getting stonewalled for the task system the company has as he refused multiple times to integrate me on it, also didn’t let me use GIT or anything which caused me to almost lose my progress of 2 weeks, so why I am wondering mostly if AITA is because there were two cases where i said some lines and I am wondering if im the asshole.

1st case: When my pc rolled back, i made a sarcastic joke: the computer rolled forward clearly sarcastic with the end, i was there with my “friend” and another co worker for context, some laughed and then he turned with a stern angry look: it’s rolled backwards not forwards, to which i replied no way continuing the sarcasm. His whole mood changed and he went on a vendetta with some nasty stuff.
2nd case: the main boss was asking how I was adjusting to work? Is it more or less stressful than expected, i replied initially i was expecting a lot more stress but it’s less than i like it here, and then the “friend” started teasing me: ohh u dont have enough stress I’ll stress the shit out of you, then the main boss said and I’ll stress him(all of this was teasingly/jokingly with laughs), friend continued and i’ll stress u even more and then I joked no thank youuu im stressed with life with a smile which had the boss burst into laughing, so I think I might have been out of taste here, but I clearly thought we were joking and it was only my 3rd day so i was awkwardly trying to fit in.
3rd case: he said explicitly he will take all the credit and there is nothing I can do about it, so i started tracking my work, writing over teams on what is done and clarifying mostly through official channels now despite my limits