How to get over some coworkers not liking me for some reason?

Anonymous
For some reason at work this coworker randomly went from being cool with me to treating me like I talked bad about him to a manager which I didn’t because i can’t even remember his name in the first place. But it’s getting me paranoid because last thing I want is someone to despise me at work. Like I can manage dealing with someone not trusting me with tasks but I don't know about this
How to get over some coworkers not liking me for some reason?
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