Analyze how your peers and managers treat you. Do they often come to you for advice? Do they listen and trust your opinions? Are their interactions with you pos

Analyze how your peers and managers treat you. Do they often come to you for advice? Do they listen and trust your opinions? Are their interactions with you positive or negative? Are you being offered good new opportunities regularly? What feedback are you receiving? It's possible people are lying to you of course, but that's pretty unusual and you'd probably see other red flags to indicate things are just not right at your job. In normal companies with normal people, you should be able to use your colleagues as good measuring sticks to whether or not you're an imposter.