It sounds like you're in the wrong job. I know how that feels. I expect if you found a job more suited to you then you would feel like you're functioning better.

It really is a compliment that people think you're so high functioning. It means that you're behaving appropriately around them, which many people who are more severely affected by autism cannot do.

Also, we shouldn't assume that non-autistic people are not also struggling in their own ways. Many people have unsuitable jobs which exchaust them, even if they are not on the autistic spectrum.