Hello,
I'm sorry to hear you feel so helpless against this feeling.
Often these come up because of some insecurity we have - don't worry, we all have insecurities and so different things will seem incredibly hard for different people.
The good thing is that we can work on those insecurities so what used to bother us doesn't anymore.
For example, I used to be pretty self-conscious about my height. I probably still am a bit to be honest, but I've come to just accept that I'm on the shorter side and that's okay. Dating was hard for me because the stereotype is that the men are taller, so it took a lot of effort on my part to keep putting myself out there. In the end, it really helped to reduce that insecurity.
So that's one way you can take, and is probably the best for you in the long term.
The other is to remove yourself from the situation altogether and find a different place to work or different shifts. I think that'll be quite complicated though and you'll be missing out on a good opportunity to really develop as a person.
I am sure you must be doing a good job there otherwise you wouldn't have a job. But you do. Perhaps there are things that Sarah does better than you, but equally there will be things that you do better than her. It sounds like you can't see those, and perhaps they wouldn't even matter because no one else pays attention. I understand that. I don't want to push you into either way, but I do think it would be helpful for you if you had a think about what you're good at and why it doesn't feel enough.
James
