Is OTHER wrong in the post ? POST : Soo, this happened some while ago but it's been brought up by a coworker recently and they made it known they thought i was an asshole for doing what i did, so i needed some neutral insight on it.

Here's what happened.

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I got a job at a fast food chain last summer during the holidays to save up some money. Worked there as a regular for three months, then became a part timer when college started again. It didn't take long until i noticed one of the supervisors was unnecessarily rude and mean to me. at first i thought it might be his personality or he must be going through a tough time, which is why he acted like he did, eg insulting me for minor mistakes, getting pissed when i didn't do smth right or didn't know how to do smth, suspecting me of talking smack about him whenever id converse with another coworker. 

but then i noticed he was nice to everyone else except for me. 

so then i thought ok, it must be because i'm still new and i'm not capable yet and he is simply frustrated that i'm not doing stuff right. but then we got another newbie and he was perfectly fine with that dude? they even became close friends in a short span of time. so that couldn't be it either.

i didn't even give him any reason to dislike me, i was always respectful and gave my best. all the other coworkers were telling me how they were impressed with how fast i got the hang of everything but for some reason i could never do anything right for him.

other coworkers would frequently have arguments with him that'd get personal, but he was still always friendly to them.

what's weird is that on some days he'd be incredibly nice and joke around n stuff but then turn right around the next day and be pissy again. i always blamed myself for his mood changes, thinking i must've given him some sort of reason to be this way and felt really guilty.

the thought crossed my mind that maybe he thought i hated him, for whatever reason, and that's why HE started to dislike me?? and it was just a huge misunderstanding. but i didn't know for sure.

i did confront him about it but he'd say that he didn't have any problems with me and he was treating me like he treated everyone else too.

at the end i just accepted that he hated me (and possibly thought that i hated him too?) and decided that i wouldn't try to make him like me and stopped caring. i noticed he was shittalking me behind my back to others and so i decided i wouldn't hold back either and openly voice my frustrations with him. i never attacked him personally tho, i only ever complained about how he handled things.

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After becoming a part timer and seeing him twice a week only, he got a lot nicer. helped me convince my store manager to give me some days off, shared personal stuff with me, joked around with me. i didn't know why he suddenly changed but i didn't think too much of it. i thought that maybe he'd finally realized i didn't have any problem with him or didn't dislike me anymore. As soon as we started getting along i stopped complaining about him too. i thought it was awesome we could finally work together without that weird tension between us.

this went on for a few months, we sort of became friends. i still had some trust issues, i got anxious every time i clocked in thinking that this time he'd be mean again (since it happened in the past, he was nice for one day, then bitchy the other). but i truly wanted to forget all the conflict and just start over new. i was a good friend to him, didn't shittalk him or anything like that. i'm not twofaced like that.

but then one day i clock in and i immediatly notice he's pissed again. i shrug it off as maybe he has a bad day, but he's nice to everyone else again. i'm like oh no is it starting again??? i thought we were getting along well? towards the end of my shift he calls me aside and tells me he needs to talk to me.

he tells me a coworker told him i was talking smack abt him to everyone else while simultaneously smiling in his face and pretending to be friends. i tell him that's not true etc, i say i only did that back when we didn't get along because i thought you hated me! after arguing for a long time (some tears of frustration on my part lol) he finally decides he believes me. i apologize to him for talking abt him in the past.

we've been good work buddies ever since (it's only been 1 month lol) even tho i still get anxious that he'll suddenly change again sometimes &amp; still don't know the reason WHY he treated me like an ass in the beginning. he seems to be over it tho and trusts me.

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still, my coworker told me they thought i was an asshole for simply assuming that he hated me "without any proof" and being vocal about my frustrations with him. so? am i the asshole? was it wrong for me to assume he hated me and deciding that i would stop caring? should i still have been nice to him? and also- what should i have reacted like instead?

//sorry in advance for any spelling &amp; grammatical mistakes, english isn't my first language